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racecadotrilAn antidiarrheal drug that is a peripherally-acting enkephalinase inhibitor.raciologicalRelating to raciology.raconteurialCharacteristic of a raconteurradioaerosol(medicine) An aerosol containing a radioisotope (typically technetium-99m) and a chelating agentradioethanolradioactive ethanol (labelled with radioactive carbon)radiohumeral(anatomy) Of, pertaining to, or joining the radius and humerus.radiologicalOf or pertaining to radiation, radioactivity or nuclear weapons.recitationalRelating to recitation.recreationalFor, or relating to, recreation.recredential(transitive) To credential again or anew.rectogenital(anatomy) Of or pertaining to the rectum and the genitals.rectovaginalOf or pertaining to the rectum and the vagina, as (usually, more specifically) a fistula between the two.rectovesical(biology, medicine) Synonym of vesicorectal.redemptionalRelating to redemption.refixationalRelating to refixationreflectionalRelating to reflection.refractionalRelating to refraction.refutationalRelated to, or characteristic of refutationregiocontrol(chemistry) control of the regiochemistry of a reactionregressional(statistics) Of or pertaining to regression.regulationalThat regulatesrelaxational(physics) Of, relating to, or caused by relaxation.relocationalRelating to relocation.remifentanil(pharmacology) A potent ultra short-acting synthetic opioid (trademark Ultiva) given to patients during surgery for pain relief and adjunctive to an anesthetic.remifentanylMisspelling of remifentanil.reparationalRelating to, or serving as, reparation.repetitionalOf the nature of, or containing, repetition.repressionalRelating to, or associated with repressionreputationalOf or pertaining to reputationreservoirfulEnough to fill a reservoir.reservosomalRelating to a reservosomeresolutionalRelating to, or leading to, resolution.responsorialA book of liturgical responsesrestraintfulFull of restraint.restructuralOf or pertaining to a restructuring.reticospinalMisspelling of reticulospinal.retinophoralOf or pertaining to retinophorae.retinotectal(anatomy) Of or pertaining to the retina and the optic tectumretrochoanal(anatomy) Behind the choanaretrochronalOperating backward in time, so that effects precede their causes.retrocorneal(anatomy) Behind a cornearetroglossal(anatomy) Behind the tongueretrolateralOn the side and facing backwardsretrolingualServing to retract the tongue.retroorbitalBehind the orbit of the eyeretropalatal(anatomy) Behind the palateretroplenialMisspelling of retrosplenial.retrospenialMisspelling of retrosplenial.retrosternal(anatomy) Located behind the sternumretroventralBehind a ventral regionretrovesicalBehind the urinary bladderrevelationalOf or pertaining to revelationrevocationalOf or relating to revocation.revolutional(rare, nonstandard) revolutionaryrewithdrawalThe act of withdrawing again.rhadinoviralof or relating to rhadinoviruses.rhetologicalRelating to rhetology.rheumatismalArchaic form of rheumatic.rheumatoidalAlternative form of rheumatoid.rhinocericalResembling or relating to the rhinoceros or its horn.rhinologicalOf or pertaining to rhinology.rhinorrhoealAlternative form of rhinorrheal.rhizological(botany) Of, or related to rhizology.rhizomorphalSynonym of rhizomorphic.rhododendrol(organic chemistry) The phenol 4-[(3R)-3-hydroxybutyl]phenol used in some skin-lightening productsrhombohedral(crystallography) Having three equal axes and oblique angles.rhopaloceralOf or relating to the Rhopalocera.robophysicalRelating to robophysicsrodenticidalServing to kill rodents, as a rodenticide.rostrocaudal(anatomy) With a direction parallel to the head-tail axis.rostrodorsal(anatomy) Near the back of the beak or of any beak-like projectionrostromedial(anatomy) medial to the rostrumrotochemical(physics, astronomy) Describing the heating produced by various affects of the reduction in angular momentum of a rotating neutron star (especially a pulsar)ruminococcalRelating to ruminococci