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iatrocideThe act of killing a patient by medical treatment.ibazocine(pharmacology) An opioid analgesic.ibogaline(organic chemistry) The alkaloid 12,13-dimethoxyibogamine present in the iboga plant (Tabernanthe iboga)ibogamine(organic chemistry) An alkaloid present in the iboga plant (Tabernanthe iboga)ibopamine(pharmacology) A sympathomimetic used in ophthalmology to induce mydriasis.ibotenate(chemistry) A salt or ester of ibotenic acid.ibutilide(pharmacology) An antiarrhythmic agent indicated for acute cardioconversion of atrial fibrillation and atrial flutter of a recent onset to sinus rhythm.icarisideAny of a group of flavonoid glycosides, related to icariin, some of which have anticancer activityichnolite(archaic) A fossil footprint; an ichnite.ichnositeA site at which ichnolites or similar fossil traces are preservedichnotype(taxonomy) A footprint of a type specimen (especially an extinct one)icinglike(rare) Resembling or characteristic of icing.iconicize(transitive) To make iconic.iconoduleA person who supports the veneration of religious icons; an iconophile or iconodulisticonotype(taxonomy) An illustration of a biological specimen that serves as a holotype or lectotype (type specimen and it becomes the type illustration). It is not an illustration of a holotype or lectotype. In the 18th and early 19th century, iconotypes were designated as type specimens when preserved specimens were not available. In the 21st century, iconotypes are being used where a live animal is recorded and then released.idealogueOne given to fanciful ideas or theories; someone who theorizes or speculates.ideascapeA figurative landscape of ideas.idebenoneA drug developed to treat Alzheimer's disease and other cognitive defects, but now being investigated for treatment of neuromuscular diseases.identicleMisspelling of identical.ideologueA person who advocates an ideology, especially as an official or preeminent advocate.ideophone(grammar) A word that uses sound symbolism to express aspects of events that can be experienced by the senses, like smell, color, shape, sound, action, or movement.ideoscape(according to Arjun Appadurai) The global flow of ideologies.idiophase(biology) The phase in the growth of a culture during which secondary metabolites are producedidiophoneAny musical instrument that produces its sound by its own vibration (without any strings or membranes).idiotlikeCharacteristic of an idiot, resembling an idiot; foolish, idiotic, stupid.idolastre(obsolete) An idolater.idoxifene(pharmacology) A nonsteroidal estrogen antagonist, structurally analogous to tamoxifen.idrialine(mineralogy) Synonym of idrialite.idrialite(mineralogy) A soft, orthorhombic hydrocarbon mineral, usually greenish-yellow to light brown in colour with bluish fluorescence.iduronate(organic chemistry) Any salt or ester of iduronic acid.ifoxetine(pharmacology) A selective serotonin reuptake inhibitor.igasurine(chemistry) An alkaloid found in nux vomica, and extracted as a white crystalline substance.igloolikeResembling an iglooignitableCapable of being ignited; able to burn.ignitibleCapable of being ignited.ignorableAble to be ignored.ignoranceThe condition of being uninformed or uneducated; lack of knowledge or information.ikunolite(mineralogy) A trigonal-hexagonal scalenohedral lead gray mineral containing bismuth, selenium, and sulfur.ilexoside(organic chemistry) Any of a group of triterpenoid saponins, present in the roots of Ilex pubescens, that have anticoagulant activityilinskite(mineralogy) An orthorhombic-dipyramidal emerald green mineral containing chlorine, copper, oxygen, selenium, and sodium.illegibleNot clear enough to be read; unreadable; not legible or decipherable.illutible(rare) That cannot be purged or washed awayilluviate(geology) To leach from an overlying stratum and accumulate in suspension.imageableCapable of being imagedimagelikeResembling or characteristic of an image.imaginate(obsolete) imaginativeimagocideAny agent that kills adult insects.imandrite(mineralogy) An orthorhombic-dipyramidal honey yellow mineral containing calcium, iron, oxygen, silicon, and sodium.imariwareSynonym of imari.imbalanceThe property of not being in balance.imberlineA multicoloured woven fabric, sometimes having gold threads, used for drapery and upholsteryimbibableAble to be imbibed.imbosture(obsolete) embossed work; ornamentation; embossmentimbrangleArchaic form of embrangle.imbreathe(transitive) To inbreathe; to breathe in.imbricate(transitive or intransitive) To overlap in a regular pattern.imerinite(mineralogy) Synonym of magnesioarfvedsonite.imidamide(organic chemistry) Synonym of amidine.imidamine(organic chemistry, medicine) The aromatic derivative of imidazole N-(4,5-dihydro-1H-imidazol-2-ylmethyl)-N-(phenylmethyl)aniline that is a histamine antagonistimidazole(organic chemistry) A group of compounds containing that structure.imidizoleMisspelling of imidazole.iminazoleAlternative form of imidazole.iminutive(grammar, rare) In Yiddish, a second-degree or more intensive diminutive form.imitativeImitating; copying; not original.imiterite(mineralogy) A monoclinic-prismatic white-gray mineral containing mercury, silver, and sulfur.immanacle(transitive, archaic) To manacleimmanenceThe state of being immanent; inherency.immediateHappening right away, instantly, with no delay.immensive(obsolete or nonstandard) Synonym of immense.immersiveTending to immerse.immigrate(intransitive) To move into a foreign country to stay permanently.imminenceThe state or condition of being about to happen; imminent quality.immitanceMisspelling of immittance.immixtureThe act, or the result of immixingimmovableincapable of being physically moved; fixedimmutableUnable to be changed without exception.imogolite(mineralogy) An aluminium silicate clay mineral found in soils formed from volcanic ash.imolamineA vasodilator.impacable(obsolete) implacable (unable to be appeased)impactiteAny rock created or modified by the impact of a meteorite.impactiveOf, pertaining to, possessing, or caused by impact.impassiveHaving, or revealing, no emotion.impastureTo place in a pastureimpatible(obsolete) Impassible.impedanceThe act of impeding; that which impedes; a hindrance.impedenceMisspelling of impedance.impedibleCapable of being impeded or hindered.impennate(zoology, archaic) Characterized by short wings unsuitable for flying, covered with feathers resembling scales, as in the penguins.imperanceAlternative form of imperence.imperence(colloquial, archaic) impertinenceimpetrate(transitive) To obtain by asking; to procure upon request.implanteeThe recipient of an implant.impliableCapable of being implied.implicate(transitive, usually with in) To show to be connected or involved in an unfavorable or criminal way.implosiveFormed by implosion.importome(biochemistry) All the proteins imported into an organelleimportune(transitive) To bother, irritate, trouble.imposableCapable of being imposed or laid on.impostume(obsolete) An abscess.impostureThe act or conduct of an impostor; deception practiced under a false or assumed character; fraud or imposition.impotable(rare) not drinkableimpotencePowerlessness; incapacity.imprecate(transitive) To call down by prayer, as something hurtful or calamitous.impreciseNot precise or exact; containing some error or uncertainty.imprinteeThe object of imprinting; the person or thing on which something imprints.improbate(obsolete, transitive) To disallow, disqualify, or annul.improviseTo make something up or invent it as one goes on; to proceed guided only by imagination, intuition, and guesswork rather than by a careful plan.improvize(rare, proscribed) Alternative spelling of improvise.impsoniteA black carbonaceous substance, believed to be derived from a fluid bitumen which polymerized after filling a vein.impudenceThe quality of being impudent, not showing due respect.impulsiveHaving the power of driving or impelling; giving an impulse; moving; impellent.imputableThat may be imputedinactuate(obsolete, transitive) To put into action; to activate.inaddable(rare) Alternative form of inaddible.inaddibleIncapable of being added.inaglyite(mineralogy) A hexagonal-dipyramidal steel gray mineral containing copper, iridium, lead, platinum, and sulfur.inaidable(obsolete) Incapable of being assisted; helpless.inamiableDisagreeable, off-putting.inamorateTo enamour, inspire with love.inanimateLacking the quality or ability of motion; as an inanimate object.inaudibleUnable to be heard or not loud enough to be heard.inaureole(transitive, literary) To give (someone) a halo; to surround (someone or something) with light.inbalanceAlternative spelling of imbalance.inbreathe(ambitransitive) To breathe (something) in; imbreathe.incantate(ambitransitive) To sing or speak formulas and/or rhyming words, often during occult ceremonies, for the purpose of raising spirits, producing enchantment, or creating other magical results.incapableNot capable (of doing something); unable.incarnate(traditionally postpositive, now frequently prepositive) Embodied in flesh; given a bodily, especially a human, form; personified.incellikeResembling or characteristic of an incel.incendiveAble to ignite, or cause ignitionincensiveTending to excite, provoke or stir up emotions; inflammatory.incensole(organic chemistry) A substance obtained from the bark of Boswellia dalzielii.incentiveSomething that motivates, rouses, or encourages.inceptiveBeginning; of or relating to inception.incessiveIntense and active.incidenceThe act of something happening; occurrence.incirrateNot cirrate; lacking cirri.inclimateMisspelling of inclement.inclosure(now uncommon) Alternative spelling of enclosure.inclusiveIncluding (almost) everything within its scope.incombine(obsolete) To not combine; to disagree, differ, or not match.incommodeTo make (someone) uncomfortable; to discomfort, to disturb, to trouble.inconditeBadly-arranged, ill-composed, disorderly (especially of artistic works).incourageArchaic form of encourage.incremate(transitive, archaic) To cremate.increpate(obsolete) To chide; to rebuke; to tell off.incubateeAn animal being raised in an incubator.inculcate(transitive) To teach by repeated instruction.inculpate(law) To imply the guilt of; to blame or incriminate.incultureTo adapt Christian teachings to suit a non-Christian culture.incunableAlternative form of incunabulum.incurableOf an illness, condition, etc, that is unable to be cured; healless.incursiveCharacterized by incursion; invasive.incurvatebending inwards.indalpineA selective serotonin reuptake inhibitor marketed in 1983 as an antidepressant but swiftly withdrawn when found to cause neutropenia.indecenceObsolete form of indecency.indelableMisspelling of indelible.indelebleObsolete form of indelible.indelibleHaving the quality of being difficult to delete, remove, wash away, blot out, or efface.indenture(law) A contract which binds a person to work for another, under specified conditions, for a specified time (often as an apprentice).indexableThat can be indexed.indexlikeResembling or characteristic of an index (ordered listing of items).indialite(mineralogy) A hexagonal-dihexagonal dipyramidal mineral containing aluminum, magnesium, oxygen, and silicon.indicable(mathematics, of a group) Such that there exists a homomorphism from it to ℤ, the integers.indicaine(organic chemistry) An alkaloid found in Plantago indica.indicible(rare) indescribableindictive(obsolete) proclaimed or declared by authorityindigenceExtreme poverty or destitution.indiosideA particular steroid glycoside.indispose(transitive) To render unfit or unsuited; to disqualify.indocibleIncapable of being taught, or not easily instructed; dull in intellect; intractable.indolenceHabitual laziness or sloth.indomableObsolete form of indomitable.inducableAlternative form of induceable.inducibleAble to be induced or caused.inductive(logic) Of, or relating to logical induction, by generalizing a universal claim or principle from the observed particular instances.indurableArchaic form of endurable.induranceObsolete form of endurance.indusiate(botany) Furnished with an indusium.induviate(botany) Covered with induviae.inebriateA person who is intoxicated, especially one who is habitually drunk.ineffableBeyond expression in words; unspeakable.inelative(grammar) Expressing the notion "from inside" or "out of".inellipse(geometry) An ellipse inscribed in a triangle.inequableNot equable; unequable.inerrableIncapable of error; infallible, unerring.inertance(physics) A measure of the inertia to flow of a fluid.ineruditeNot erudite; unlearned; ignorant.inevasiveSynonym of unevasive.inexpiate(obsolete, poetic) Not appeased or placated.infantilePertaining to infants.infantineInfantile; childish.infantize(transitive) infantilizeinfatuate(transitive) To inspire with unreasoning love, attachment or enthusiasm.infectiveAble to cause infection; infectiousinfectomeAll the infectious organisms associated with a particular diseaseinferableThat may be inferred or drawn as a conclusion; deducible; that may be put together from previous knowledge and current evidence.inference(uncountable) The act or process of inferring by deduction or induction.inferibleAlternative spelling of inferrible (synonym of inferable).infestiveTending to infest; acting like an infection.infeudate(transitive, historical, Middle Ages) To invest (someone) with feudal powers.infiltreeOne who infiltrates a country.inflative(obsolete) Of an inflating quality or tendency.inflexive(especially grammar) inflective; inflectionalinflexure(archaic) A flexion, a bend or fold.influenceAn action exerted by a person or thing with such power on another to cause change.influxiveHaving a tendency to flow inward.infoliate(transitive) To cover or spread with, or as if with, leaves.infoscapeThe virtual landscape of information.infranateinfranatant materialinfringeea victim of an infringementinfuriateTo make furious or mad with anger; to fill with fury.infuscate(transitive, obsolete) To darken; to make black or obscure.infusibleThat cannot be fused; unmeltable.ingeniate(obsolete) To invent; to contrive.ingenuinefalse, not genuine or unauthentic.ingestiveOf or pertaining to ingestion.ingleside(obsolete or Scotland) Beside an open fireplace.inglobateIn the form of a globe or sphere; applied to nebulous matter collected into a sphere by the force of gravitation.ingotlikeResembling an ingot.ingrapple(obsolete, poetic) To seize, clutch, or grapple.inhalableThat can be inhaled.inherenceThe state of being inherent or permanently present in something; indwelling.inheritee(uncommon) Heir, inheritor; one who inherits.iniquitieObsolete spelling of iniquity.initiableAble to be initiatedinitiateeOne who, or that which, is initiated.injectateMaterial that is injected.injectite(geology) A material formed by injection of a sediment, typically between stratainjective(mathematics) Of, relating to, or being an injection: such that each element of the image (or range) is associated with at most one element of the preimage (or domain); inverse-deterministicinjurableCapable of being injured.injusticeAbsence of justice; unjustice.inkbottleAlternative spelling of ink bottle.inleakageA leak inward from the outside.inlinable(software compilation) Capable of being inlined.innerducePronunciation spelling of introduce.innersoleAn insole; a cushioning layer lining the inside bottom of a shoe or boot.innertubeAlternative spelling of inner tube.innervate(anatomy, zoology) To supply (an organ or part of the body) with nerves.innocenceAbsence of responsibility for a crime, tort, etc.innocenteSynonym of robe volante.inocubateMisspelling of inoculate.inoculate(transitive, by extension) To safeguard or protect something as if by inoculation.inodorate(obsolete) scentless; without an odourinopinate(obsolete) Not expected, thought of, or looked for.inosamine(organic chemistry) Any amine derived from inositol by replacing one or more -OH groups with -NH₂inosinateAny salt or ester of inosinic acid; the salts are used as flavour enhancers.inosinome(biochemistry) All the inosines of an organisminositide(organic chemistry) Any phospholipid containing inositol; phosphatidylinositol.inotilone(organic chemistry) The cyclooxygenase inhibitor (2Z)-2-[(3,4-dihydroxyphenyl)methylene]-5-methyl-3(2H)-furanone present in some mushroomsinquiline(biology) An animal that lives commensally in the nest, burrow, gall, or dwelling place of an animal of another species.inquinate(formal) To pollute or make dirty.inquorateThat lacks the number sufficient to form a quorum.insanableNot capable of being healed, incurable, irremediable.insaniate(obsolete, transitive) To render unsound; to make mad.insatiate(archaic or literary) That is not satiated; insatiable.inscience(obsolete) Ignorance; the lack of knowledge.insecableindivisible (literal or figurative)insectileof, or pertaining to insectsinsensateHaving no sensation or consciousness; unconscious; inanimate.insertiveOf or relating to insertion, especially in regard to sexual acts.inservicein-service traininginsheatheArchaic form of ensheathe.insidiate(transitive, obsolete) To lie in ambush for.insincereNot genuinely meaning what has been expressed; not sincere; artificial; factitious.insinuateTo hint; to suggest tacitly (usually something bad) while avoiding a direct statement.insistive(archaic) insistentinsociate(obsolete) unaccompanied; solo.insolenceContemptible, ill-mannered conduct; insulting: arrogant, bold behaviour or attitude.insoluble(physical chemistry) That cannot be dissolved.inspecteeOne who undergoes an inspection.inspirate(medicine) Something inhaled.instaunceObsolete form of instance.instigate(transitive) To bring about by urging or encouraging.instituteAn organization founded to promote a causeinsuetude(archaic) The state or quality of being unaccustomed; lack of habit.insulableCapable of being isolated.insultive(rare, nonstandard) Insulting.insurableCapable of being insured.insuranceA means of indemnity against a future occurrence of an uncertain event.intectate(botany, palynology) Having a sculptured surface but no tectum (of pollen).integrase(biochemistry) Any enzyme that integrates viral DNA into that of an infected cellintegrate(transitive) To include as a constituent part or functionality.intenable(obsolete) Untenable.intenible(obsolete) Incapable of holding or containing.intensate(transitive, archaic) To intensify.intensiveDone with intensity or to a great degree; thorough.intentivePaying attention; attentive, heedful.interaxleBetween axles.interbyteBetween bytes.intercaseBetween cases.intercaveBetween caves.intercede(intransitive) To plead on someone else's behalf.intercome(intransitive) To intervene; interpose; interfere.interconeBetween cones or similar conical featuresintercoreBetween cores.interdateTo take part in interdating.interdine(intransitive) To eat with one another; used especially of people of different castes.interdomeBetween domes.interdose(medicine) Between consecutive doses.interduce(construction) An intertie.interduneBetween dunes.interedgeBetween edgesinterfaceThe point of interconnection or contact between entities.interfere(intransitive) To get involved or involve oneself, causing disturbance.interfile(transitive) To file (something) between or among existing entries.interfuseTo fuse or blend togetherintergeneBetween genes.interlace(visual arts) A decorative element found especially in early medieval artinterlakeBetween lakes.interlineBetween lines.interlobeBetween lobesinterlopeTo intrude, meddle, or trespass in others' affairs.interludeAn intervening episode, etc.interlune(rare) Synonym of interlunation.intermaleBetween males.intermateTo mate with a member of another species or group.intermazeBetween different mazes (in the context of animal experiments).intermedeA short musical dramatic piece, of a light, pleasing, and sometimes burlesque character.intermine(by extension) Intermix; intersperse.intermise(obsolete) interference, intervention or intermediationintermodeBetween modes.internodeBetween nodes.interpageBetween the pages of a document or website.interpale(rare, obsolete) To place pales between or among; to separate with pales.interpole(electrical engineering) An auxiliary pole of a commutator placed between the main poles to increase its efficiency.interpone(transitive) To interpose; to insert or place between.interporeBetween pores.interpose(transitive) To insert something (or oneself) between other things.intersaleThe sale of goods or services to each other by multiple parties.intersiteBetween sites (places or websites).intertoneBetween tonesintertreeBetween treesintertubeBetween or among tubes or nanotubes.intertype(computing, programming) Between data types.intervaleAn alluvial terrace or plain.intervene(intransitive) To become involved in a situation, so as to alter or prevent an action. [with in]intervise(transitive) To televise over the Internet.interwaveBetween waves.interwireBetween wires.interwovesimple past of interweaveinterzine(rare) An online publication whose onscreen appearance simulates that of a printed magazine.interzoneA position between neighbouring zonesintestateWithout a valid will indicating whom to leave one's estate to after death.intestine(anatomy, often pluralized) The alimentary canal of an animal through which food passes after having passed all stomachs.intextineAlternative form of intexine.intimisteAlternative form of intimist.intracase(of a comparison) Within a single case.intracule(physics, chemistry) a mathematical function that gives the probability of observing two electrons in a given molecule with a given difference in position or momentumintradyne(physics, of radiation) Having an overlapping range of frequencies with anotherintralakeWithin a single lake.intramazeFrom inside a mazeintramode(physics) Within a modeintranodeWithin a single node.intrapageWithin a single page of a document or website.intrasiteWithin a site (place or website).intrative(grammar, rare) Of or relating to a grammatical case with the sense "among" or "amidst".intratubeWithin a single tube.intrawireWithin a single wire.intricateHaving a great deal of fine detail or complexity.introduce(transitive, of people) To cause (someone) to be acquainted (with someone else).intronize(genetics) To undergo intronizationintrosume(obsolete, transitive) To draw in, swallow or absorb.intrusiveTending to intrude; doing that which is not welcome; interrupting or disturbing; entering without permission or welcome.intuitiveSpontaneous, without requiring conscious thought.intumesceTo swell or enlarge (abnormally)inulinase(biochemistry) An enzyme, 1-beta-D-fructan fructanohydrolase, that catalyses the endohydrolysis of (2->1)-beta-D-fructosidic linkages in inulin.inumbrate(obsolete) To put in shadow; to darken.inusitate(archaic) Unusual.invacuateto confine (people) to a closed area in an emergency situationinvadableAble to be invadedinvasible(biology) Capable of being invaded by invasive speciesinvectiveAn expression which inveighs or rails against a person.inventiveOf, or relating to invention; pertaining to the act of devising new mechanisms or processes.inversiveOf, pertaining to or characterised by inversion.invertase(biochemistry, organic chemistry) An enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose (invert sugar), used by bees to produce honey and in the food industry to soften chocolate.invertiveOf or relating to grammatical case in some languages that functions like the subjunctive mood.investive(law) Serving or tending to invest, or endow with a right or possession.investure(obsolete) To clothe; to invest.inviolateNot violated; free from violation or hurt of any kind; secure against violation or impairment.inviscate(transitive, obsolete) To daub, catch, or entangle with glue or birdlime or other viscous matter.invisibleUnable to be seen; out of sight; not visible.invitableCapable of, or suitable for, being invited.invocable(computing) That can be invoked; callable.invokable(computing) That can be invoked; callable.involucre(botany) Conspicuous bract, bract pair or ring of bracts at the base of an inflorescence.inwreathe(transitive, obsolete, poetic) To surround or encompass as with a wreath.iodoarene(organic chemistry) Any iodo derivative of an areneiodophileAn iodophilic cell.iodophoreAlternative form of iodophor.ioflupaneA phenyltropane compound used in neuroimaging.ioglunide(pharmacology) An iodinated contrast dye.ionizableCapable of being ionizedionopauseThe boundary layer of the ionosphere, where it meets the mesosphere or exosphere.ionophore(chemistry) Any substance that can transfer ions from a hydrophilic medium (such as water) to a hydrophobic medium, or across a biological membrane, normally by forming a reversible complex with it; an ion carrierionosondeA radar for the examination of the ionosphere.iopromide(pharmacology) A molecule used as a contrast medium.iotroxate(organic chemistry) Any salt or ester of iotroxic acidioxaglate(organic chemistry) Any salt or ester of ioxaglic acid.ipazilideAn antiarrhythmic drug.iprindoleA tricyclic antidepressant.iprodioneAn imidazole fungicide.irascibleEasily provoked to outbursts of anger; irritable.irhtemite(mineralogy) A monoclinic mineral containing arsenic, calcium, hydrogen, magnesium, and oxygen.iridocyte(histology) A cell, found in some animals, that is filled with iridescent crystals of guanineiridosome(biology) A cytoplasmic organelle of iridophore cellsiriginite(mineralogy) An orthorhombic-dipyramidal canary yellow mineral containing hydrogen, molybdenum, oxygen, and uranium.ironiciseAlternative form of ironicize.ironstoneAny ore of iron which is impure through the admixture of silica or clay.irradiateMade brilliant or bright; irradiated, illuminated.irratableMisspelling of irritable.irregible(rare) Not regible; ungovernable, unmanageable, intractable.irrigableAble to be irrigated.irrisible(archaic) Not risible; unfunny or unable to make laughirritableCapable of being irritated.irruptiveHaving the quality of irrupting or making irruptions.irtyshite(mineralogy) A hexagonal mineral containing sodium, tantalum, niobium, and oxygen.isapostleAn equal of the Apostles.isaxonineA particular heterocyclic compound.isentrope(meteorology) A surface of constant potential temperatureisoalkane(organic chemistry) Any branched-chain alkane, but especially one having a methyl group attached to the penultimate carbon atom of the main chainisoallele(genetics) Either of several near-identical alleles that can only be distinguished when in combination with another (typically mutant) alleleisobutane(organic chemistry) A hydrocarbon, a particular isomer of C₄H₁₀ found in natural gas.isobutene(organic chemistry) The unsaturated hydrocarbon methylpropene, (CH₃)₂C=CH₂; used in the manufacture of polybutene and butyl rubber.isocentre(medical imaging, radiation therapy) The point through which the central ray of the radiation beam passesisocetane(organic chemistry) 2,2,4,4,6,8,8-heptamethylnonane, a highly branched alkane used as a reference in determining the cetane number of diesel.isochargeA sequence of ions that have the same chargeisochroneAn isoline on a map or chart connecting points that have the same value for some time-related variable.isodapane(economics) An isoline joining points on a map with the same total transport costs.isoenzyme(biochemistry) Any of a group of enzymes that catalyze the same reaction but have structures that are (minorly or substantially) different and have physical, biochemical, and immunological properties that are (minorly or substantially) different.isofemale(genetics) Originating from a single wild femaleisofurane(organic chemistry) Alternative form of isofuran.isogamete(biology) Either of a pair of conjugating gametes that are of the same size and structureisogenizeTo become isogenic (via isogenesis)isohalineAn isoline on a map that links places (in water) that have the same salinity.isohexane(organic chemistry) Any of several isomers of hexane, or a mixture of these isomers used as a solventisoimmune(biology, immunology, medicine) Synonym of alloimmune.isoindene(organic chemistry) A flammable polycyclic hydrocarbon with the chemical formula C₉H₈, composed of a cyclohexadiene ring fused with a cyclopentadiene ring.isoindole(organic chemistry) A bicyclic heterocycle that is an isomer of indoleisolativeRelating to, characterized by, or causing isolation.isoledene(organic chemistry) The sesquiterpene (1aR,4R,7R,7bS)-1,1,4,7-tetramethyl-1a,2,3,4,5,6,7,7b-octahydrocyclopropa[e]azuleneisoluraneMisspelling of isoflurane.isomeraseAny enzyme which catalyzes the conversion of one isomeric form of a chemical compound to another.isomerate(organic chemistry) The product of an isomerization reaction, but especially a higher-octane petroleum produced by isomerizing simple alkanes.isomeride(chemistry, dated) An isomer.isomeriseAlternative spelling of isomerize.isomerize(chemistry) to convert a compound into a different isomeric formisononane(chemistry) Any nonane other than CH₃(CH₂)₇CH₃.isooctane(organic chemistry) any isomer of n-octane; especially 2,2,4-trimethylpentane, used as a reference in the determination of the octane number of fuelisopanose(biochemistry) A trisaccharide that is an isomer of panose.isopilineThe alkaloid (6aR)-2,3-dimethoxy-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinolin-1-olisosalineHaving equal salinityisostableEqually stableisotonizeTo make isotonicisovaline(biochemistry) The rare amino acid 2-amino-2-methylbutanoic acid that was found in the Murchison meteoriteisovolumeRelating to the same volumeisoxazole(organic chemistry) 1,2-oxazole, an isomer of oxazole with many derivatives that have pharmacological activity.israelane(organic chemistry) A certain isomer of [12] prismane, shaped like a six-pointed star.isuretine(chemistry) A synthetic nitrogenous base, isomeric with urea.itabirite(mineralogy) A laminated form of quarzite with muscovite or other iron minerals.itaconate(chemistry) Any salt or ester of itaconic acid.italiciseNon-Oxford British English standard spelling of italicize.italicize(typography) To put into italics.itamelineA cholinergic agonist.itamiwake(sumo) A draw due to the injury of one of the wrestlersitanoxoneAn antilipidemic drug.iterative(grammar) Expressive of an action that is repeated with frequency.ithomiine(zoology) a butterfly in the nymphalid tribe Ithomiini.itinerate(intransitive) To travel from place to place, especially to preach or lecture.ittnerite(mineralogy) A dark blue or grey mineral, consisting chiefly of silica, alumina, potash, and soda.ivorylikeResembling ivory.ivorytype(photography, dated) A picture produced by superposing a tinted translucent print upon a stronger print, so as to give the effect of a photograph in natural colours.ivorywareArticles made from ivory.ixodicideA substance that kills ticks.ixoroside(organic chemistry) A particular iridoid glycoside.