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saccolabiumAny plant of the genus Saccolabium.sacculiformShaped like a little sac.sacerdotismSynonym of sacerdotalism.sacramentum(historical) An Ancient Roman oath or vow that rendered the swearer "given to the gods", in the negative sense if he violated it.sagittiform(biology) Having the form of an arrowhead, but lacking flaring lobes on the base.salmoniformAny fish of the order SalmoniformessanctionismA policy of imposing sanctions.sandaliform(botany) shaped like a sandal or slipper.sanfetrinemA beta-lactam antibiotic.sarcoseptum(archaic, zoology) A mesentery of an anthozoan.sardonicismThe quality of being sardonicsatellitism(virology) An obligate association between two virusessatellitium(astrology) A grouping of several planets in a sign.scalariformHaving the form of a ladderscalpriform(archaic) Shaped like a chisel.scatologismA scatological term or phrase.schismatismThe beliefs associated with a schism or breakaway faction.schizoidism(psychiatry) The condition of being schizoid.scientifilm(dated, fandom slang) A motion picture in the genre of science fiction.scientolism(dated) pseudosciencescoleciformShaped like a scolex.scolopidium(zoology) The most fundamental unit of a mechanoreceptor organ in insectsscombriform(zoology) Any fish of the order Scombriformesscopuliformscopiform on a smaller scalescorpionismscorpion envenomationscribbledom(dated) The world or sphere of bad writing.scriptorium(countable) A room set aside for the copying, writing, or illuminating of manuscripts and records, especially such a room in a monastery.scripturismAdherence to the Scriptures.sedentarismThe habit of being sedentary.semanticismThe belief that semantics is central to grammar.semantogramA symbol used solely for meaning, as when logographic Chinese symbols are used to represent the meaning of native Japanese words.semifascismAlternative spelling of semi-fascism.semipremiumSuperior to the standard version, but not quite premium.semiquantum(physics) Describing any system that shows some characteristics of a quantum one; semiclassicalsemirealismA semirealistic approach in art, philosophy, etc.; partial realism.semiuniformSomewhat uniform; partially uniform.sempervivumAny of the genus Sempervivum of succulent plants, the houseleeks or liveforevers.sempiternumA durable twilled woollen material.sericterium(zootomy) A silk gland, as in the silkworms.servosystemA servomechanism or system of servomechanisms.sexdigitismThe state of having six fingers on a hand, or six toes on a foot.shepherdismPastoral life or occupationshopaholismAn addiction to shopping; the condition of a shopaholic.shunamitism(historical) The ancient practice of an old man sleeping with, but not necessarily having sex with, a young virgin to preserve his youth.sickularism(India, politics, derogatory) Secularism, viewed as being anti-Hindu.siliquiform(botany) Having the form of a silique.silvalactam(organic chemistry) A macrolactam antibiotic produced by some strains of Streptomycessilvaniform(biology) An insect that inhabits treessimultaneumA simultaneous occurrence of unrelated events.singularism(philosophy) The philosophical strategy that asserts the validity of only a single interpretation.sinisterismA sinister atmosphere.siphoniformShaped like a siphon.skeletalism(rare) The process of making something skeletal, or reducing it to the barest form.skinheadismThe practices or beliefs of skinheads.skinimalism(neologism) A skincare philosophy which emphasizes simplicity and only using products which are absolutely necessary.skyrmionium(physics) A pair of skyrmions of opposite topological quantum numbersslacktivism(informal, derogatory) Half-hearted activism, usually in the form of posting badges, images, apps, or text on social media without taking further action.sociologismThe attribution of a sociological basis to another discipline.solutionismThe belief that all difficulties have benign solutions, often of a technocratic nature.somatoplasmThe protoplasm of somatic cells.sonomyogramA sonogram of muscle tissuesoundsystemAlternative spelling of sound system (chiefly the Jamaican sense)southernismAnything characteristic of the southern part of a region, especially the southern United States.spangenhelmA kind of medieval European combat helmet, constructed of several plates connected by bands into a conical covering for the top of the head, sometimes with a nasal, eye protection, or cheek plates.spatuliformShaped like a spatula.spectaculum(archaic, rare) A spectacle.spectralismA musical composition practice in which compositional decisions are often informed by the analysis of sound spectraspectrogramA visual representation of the spectrum of a sound changing through time.speleothermAlternative form of speleothem.spermatovum(biology) A fecundated ovum.spermiogramSynonym of semenogram.spermoplasm(cytology) The cytoplasm of spermatozoasphaeridium(botany) Synonym of capitulum.spheroidism(rare) The quality of having a spheroidal shape.spheroplasmThe cytoplasm of a spheroplastsphygmogramThe recording made by a sphygmographspiculiform(archaic, zoology) Having the shape of a spicule.spindleworm(rare) The larva of a noctuid moth (Achatodes zeae) which feeds inside the stalks of maize. It is smooth, with a black head and tail and a row of black dots across each segment.spinsterdomThe state of being a spinster.spinsterismThe state of a woman who is a spinster, i.e. unwed.spintherism(medicine) photopsiaspinuliformResembling a spinule.spiraliformspiral-shapedspirolactam(organic chemistry) Any spiro compound containing a bridged lactam groupspliceoformAlternative form of splice form.splitterismThe ideology of a splitter (one who prefers to split categories into smaller groups).spontaneism(politics) The belief that a revolution should arise spontaneously.sporidiolumA secondary sporidium.sporogoniumThe sporophyte of a bryophyte (moss, liverwort or hornwort), generally consisting of a foot, seta and capsule.squatterdomThe realm or sphere of squatters.squatterismThe habits of squatters, occupying land without permission.squirreldomThe condition or state of being a squirrel, or of belonging to the world of squirrels; squirrels collectively.stabilogramA graphical representation of the small movements of a person in a stable stance (as feedback responds to potential instabilities)stalwartismA stalwart approach or attitude.staminodium(botany, uncommon) Alternative form of staminode.standardismThe practice of following or imposing standards.standpatismresistance to changestatoconium(anatomy, medicine) Synonym of otolith.statuvolism(now historical) Self-hypnosis.steganogramA steganographic image.stereoplasm(biology) The solid or insoluble portion of the cell protoplasm.sterigmatum(mycology) Alternative form of sterigma.sticklerism(derogatory) The behaviour of a stickler; inflexible adherence to rules.stipitiform(botany) Having the shape of a stalk.stipuliform(botany) Resembling a stipule.stomatodeumAlternative form of stomodaeum.strangerdomThe condition or status of being a stranger.strippagramAlternative form of stripogram.strippogramAlternative form of stripogram.struggleism(rare) A doctrine or philosophy based around struggle or conflict.styletiformShaped like a stylet.stylopodium(botany) An expansion at the base of the style, as in umbelliferous plants.subangstrom(physics) Smaller than an angstromsubcallosum(anatomy) The subcallosal region of the corpus callosumsubdeliriumMild delirium.subfusiformAlmost or imperfectly fusiform.subhymeniumThe supportive hyphae from which the cells of the hymenium grow.submarinism(dated) The use of submarines in warfare.subnanogramHaving a mass of less than a nanogramsubpicogramHaving a mass of less than a picogramsubplatformA platform that forms part of a larger platform.subpyriformSomewhat pyriform.subrefugiumA subordinate refugiumsubreniformSomewhat kidney-shapedsubspectrum(physics) Any of a number of spectra of components of a mixture that together make an observed spectrumsubstratism(linguistics) The theory that creoles take their structure from their substrate languages.subsynoviumThe lowest layer of a synoviumsubtomogramPart of a tomogram or of a series of overlapping tomogramssuburbandomSynonym of suburbanism.suburbanismSuburban lifestyles and attitudes generallysuccedaneumA substitute, replacement for something else, particularly of a medicine used in place of another.sulfenylium(chemistry) any univalent cation of general formula RS⁺ (where R is not H)sulfoxonium(organic chemistry) Any cation of the form R₃S⁺=OsulphuretumAn ecosystem in which bacteria convert sulfur into different chemical forms (sulfate, sulfide etc.), often in a cyclic manner.sulphuricum(obsolete, organic chemistry) sulphuric acid, oil of vitriolsupercilium(anatomy, rare) The eyebrow (arch of hair above each eye).superfandomThe state or condition of being a superfan; extremely strong fandom.superorgasmA remarkably exciting and pleasurable experience akin to orgasm.superphylum(taxonomy) A taxonomic category above phylum and below subkingdomsuperregnum(biology, taxonomy) A rank in the classification of organisms: a superkingdom or domain.supersystemA system comprising several subsystems.suppedaneuma foot-support for a crucified person, projecting from the base of the crosssupremacismThe belief that a certain group of people are far more superior compared to anyone else, such as those who belong to it are entitled to dominate, control, or rule those who do not. The supposed superior people can also be defined by age, gender, race, ethnicity, religion, sexuality, language, social class, ideology, nation, culture, or belonging to any other part of a particular population.suprematismAlternative letter-case form of Suprematism.surdimutism(dated, rare) Synonym of deafmutism.survivalismA belief, expressed by survivalists, in being prepared to survive disasters and cataclysms including the collapse of civilization; the practice of preparing for such events.suxethonium(pharmacology) A muscle relaxant drug.syllabariumHistorical form of syllabary.syllabogramA symbol that represents a syllable.symbiontism(biology) The condition of being symbionticsymbolicismAn approach to understanding human cognition that is committed to language like symbolic processing as the best method of explanation.synaptiformHaving the form of, or in the manner of a synapsesynaptogramA graphical representation of synapses obtained by labelling synapsinsynchrogramA graphical representation of the synchronisation of two oscillating systemssynchronismThe state of being synchronous.syndicalism(socialism) Control of both industry and government by labor unions, especially as achieved through revolutionary direct action; advocacy for attempts to bring it about.synhymenium(zoology) A hypostomial frange.syphiloderm(archaic, medicine) syphilid.systematismThe reduction of facts or principles to a system.