| acantha | (noun) any sharply pointed projection | Synonyms: spine, spur |
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| agnathan | (noun) eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms | Synonyms: jawless fish, jawless vertebrate |
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| althaea | (noun) any of various plants of the genus Althaea; similar to but having smaller flowers than genus Alcea | Synonyms: althea, hollyhock |
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| aminomethane | (noun) a methyl with the hydrogen atom replaced by an amino radical | - |
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| athanor | (noun) a furnace that feeds itself so as to maintain a uniform temperature; used by alchemists | - |
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| athar | (noun) essential oil or perfume obtained from flowers | Synonyms: atar, attar, ottar |
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| azimuthal | (adjective) of or relating to or in azimuth | - |
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| benthal | (adjective) of or relating to or happening on the bottom under a body of water | Synonyms: benthic, benthonic |
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| betrothal | (noun) the act of becoming betrothed or engaged | Synonyms: espousal |
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| (noun) a mutual promise to marry | Synonyms: engagement, troth |
| bismuthal | (adjective) of or relating to bismuth | - |
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| breathalyse | (verb) test someone's alcohol level in his blood by means of a breathalyzer | Synonyms: breathalyze |
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| breathalyser | (noun) a device that measures chemicals (especially the alcohol content) in a person's expired breath | Synonyms: breathalyzer |
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| breathalyze | (verb) test someone's alcohol level in his blood by means of a breathalyzer | Synonyms: breathalyse |
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| breathalyzer | (noun) a device that measures chemicals (especially the alcohol content) in a person's expired breath | Synonyms: breathalyser |
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| catharsis | (noun) (psychoanalysis) purging of emotional tensions | Synonyms: abreaction, katharsis |
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| (noun) purging the body by the use of a cathartic to stimulate evacuation of the bowels | Synonyms: katharsis, purgation |
| cathartic | (adjective) emotionally purging (of e.g. art) | Synonyms: releasing |
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| (adjective) strongly laxative | Synonyms: evacuant, purgative |
| (adjective) emotionally purging | Synonyms: psychotherapeutic |
| (noun) a purging medicine; stimulates evacuation of the bowels | Synonyms: aperient, physic, purgative |
| cathartid | (noun) large birds of prey superficially similar to Old World vultures | Synonyms: New World vulture |
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| chaetognathan | (adjective) of or relating to arrowworms | Synonyms: chaetognathous |
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| chlorthalidone | (noun) a diuretic (trade names Hygroton and Thalidone) used to control hypertension and conditions that cause edema; effective in lowering blood pressure to prevent heart attacks | Synonyms: Hygroton, Thalidone |
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| coryphantha | (noun) a cactus of the genus Coryphantha | - |
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| dethaw | (verb) become or cause to become soft or liquid | Synonyms: dissolve, melt, thaw, unfreeze, unthaw |
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| dexamethasone | (noun) a corticosteroid drug (trade names Decadron or Dexamethasone Intensol or Dexone or Hexadrol or Oradexon) used to treat allergies or inflammation | Synonyms: Decadron, Dexamethasone Intensol, Dexone, Hexadrol, Oradexon |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dichloromethane | (noun) a nonflammable liquid used as a solvent and paint remover and refrigerant | Synonyms: methylene chloride |
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| enthalpy | (noun) (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure | Synonyms: H, heat content, total heat |
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| epithalamium | (noun) an ode honoring a bride and bridegroom | - |
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| ethanal | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: acetaldehyde |
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| ethanamide | (noun) a colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds | Synonyms: acetamide |
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| ethane | (noun) a colorless odorless alkane gas used as fuel | Synonyms: C2H6 |
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| ethanediol | (noun) a sweet but poisonous syrupy liquid used as an antifreeze and solvent | Synonyms: ethylene glycol, glycol |
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| ethanoate | (noun) a salt or ester of acetic acid | Synonyms: acetate |
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| ethanol | (noun) the intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent or in medicines and colognes and cleaning solutions and rocket fuel; proposed as a renewable clean-burning additive to gasoline | Synonyms: ethyl alcohol, fermentation alcohol, grain alcohol |
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| ethoxyethane | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ether, ethyl ether, vinyl ether |
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| euthanasia | (noun) the act of killing someone painlessly (especially someone suffering from an incurable illness) | Synonyms: mercy killing |
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| euthanatise | (verb) intentionally cause the painless death of a person or animal | Synonyms: euthanatize, euthanise, euthanize, mercy kill |
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| euthanatize | (verb) intentionally cause the painless death of a person or animal | Synonyms: euthanatise, euthanise, euthanize, mercy kill |
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| euthanise | (verb) intentionally cause the painless death of a person or animal | Synonyms: euthanatise, euthanatize, euthanize, mercy kill |
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| euthanize | (verb) intentionally cause the painless death of a person or animal | Synonyms: euthanatise, euthanatize, euthanise, mercy kill |
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| exophthalmos | (noun) protrusion of the eyeball from the socket | - |
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| firsthand | (adjective) received directly from a source | - |
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| (adverb) from the original source; directly | Synonyms: at first hand |
| halothane | (noun) a nonflammable inhalation anesthetic that produces general anesthesia; used along with analgesics and muscle relaxants for many types of surgical procedures | - |
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| hypothalamic | (adjective) of or relating to the hypothalamus | - |
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| hypothalamically | (adverb) with respect to the hypothalamus | - |
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| hypothalamus | (noun) a basal part of the diencephalon governing autonomic nervous system | - |
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| indomethacin | (noun) a nonsteroidal anti-inflammatory drug (trade name Indocin) | Synonyms: Indocin |
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| katharobe | (noun) an organism that lives in an oxygenated medium lacking organic matter | - |
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| katharobic | (adjective) of living being in an oxygenated environment lacking organic matter | - |
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| katharometer | (noun) measures thermal conductivity | - |
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| katharsis | (noun) (psychoanalysis) purging of emotional tensions | Synonyms: abreaction, catharsis |
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| (noun) purging the body by the use of a cathartic to stimulate evacuation of the bowels | Synonyms: catharsis, purgation |
| lagophthalmos | (noun) abnormal condition in which an eye cannot close completely | - |
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| lanthanide | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanoid, lanthanon, rare-earth element, rare earth |
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| lanthanoid | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanide, lanthanon, rare-earth element, rare earth |
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| lanthanon | (noun) any element of the lanthanide series (atomic numbers 57 through 71) | Synonyms: lanthanide, lanthanoid, rare-earth element, rare earth |
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| lanthanum | (noun) a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth | Synonyms: atomic number 57, La |
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| lefthander | (noun) a baseball pitcher who throws the ball with the left hand | Synonyms: left-handed pitcher, left-hander, left hander, lefty, southpaw |
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| lethal | (adjective) of an instrument of certain death | Synonyms: deadly |
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| lethality | (noun) the quality of being deadly | Synonyms: deadliness |
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| lethargic | (adjective) deficient in alertness or activity | Synonyms: unenergetic |
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| lethargically | (adverb) without energy; in a lethargic manner | Synonyms: unenergetically |
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| lethargy | (noun) weakness characterized by a lack of vitality or energy | Synonyms: inanition, lassitude, slackness |
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| (noun) inactivity; showing an unusual lack of energy | Synonyms: flatness, languor, phlegm, sluggishness |
| (noun) a state of comatose torpor (as found in sleeping sickness) | Synonyms: lassitude, sluggishness |
| leviathan | (noun) the largest or most massive thing of its kind | - |
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| (noun) monstrous sea creature symbolizing evil in the Old Testament | - |
| maltha | (noun) a thick black tar intermediate between petroleum and asphalt | Synonyms: mineral tar |
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| methacholine | (noun) parasympathomimetic drug (trademark Mecholyl) that stimulates secretions and smooth muscle activity | Synonyms: Mecholyl |
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| methadon | (noun) synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction | Synonyms: dolophine hydrochloride, fixer, methadone, methadone hydrochloride, synthetic heroin |
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| methadone | (noun) synthetic narcotic drug similar to morphine but less habit-forming; used in narcotic detoxification and maintenance of heroin addiction | Synonyms: dolophine hydrochloride, fixer, methadon, methadone hydrochloride, synthetic heroin |
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| methamphetamine | (noun) an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant | Synonyms: chalk, chicken feed, crank, deoxyephedrine, glass, ice, meth, methamphetamine hydrochloride, Methedrine, shabu, trash |
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| methanal | (noun) a colorless poisonous gas; made by the oxidation of methanol | Synonyms: formaldehyde |
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| methane | (noun) a colorless odorless gas used as a fuel | - |
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| methanogen | (noun) archaebacteria found in anaerobic environments such as animal intestinal tracts or sediments or sewage and capable of producing methane; a source of natural gas | - |
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| methanol | (noun) a light volatile flammable poisonous liquid alcohol; used as an antifreeze and solvent and fuel and as a denaturant for ethyl alcohol | Synonyms: methyl alcohol, wood alcohol, wood spirit |
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| methapyrilene | (noun) antihistamine used to treat allergic responses (as rhinitis or dermatitis or pruritus) | - |
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| methaqualone | (noun) sedative-hypnotic drug (trade name Quaalude) that is a drug of abuse | Synonyms: Quaalude |
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| metharbital | (noun) anticonvulsant drug (trade name Gemonil) used in the treatment of epilepsy | Synonyms: Gemonil |
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| methylenedioxymethamphetamine | (noun) a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects; it was formerly used in psychotherapy but in 1985 it was declared illegal in the United States | Synonyms: MDMA |
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| mithan | (noun) ox of southeast Asia sometimes considered a domesticated breed of the gaur | Synonyms: Bibos frontalis, gayal |
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| nanophthalmos | (noun) condition in which both eyes are abnormally small but otherwise normal | - |
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| naphtha | (noun) any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents | - |
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| naphthalene | (noun) a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs | - |
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| neanderthal | (adjective) ill-mannered and coarse and contemptible in behavior or appearance | Synonyms: boorish, loutish, neandertal, oafish, swinish |
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| nighthawk | (noun) mainly nocturnal North American goatsucker | Synonyms: bullbat, mosquito hawk |
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| (noun) a person who likes to be active late at night | Synonyms: night owl, nightbird |
| nitrochloromethane | (noun) gaseous form of chloropicrin used as tear gas | - |
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| nonlethal | (adjective) not capable of causing death | - |
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| norethandrolone | (noun) a synthetic progestational hormone (trade name Norlutin) used in oral contraceptives and to treat endometriosis | Synonyms: norethindrone, norethindrone acetate, Norlutin |
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| nuthatch | (noun) any of various small short-tailed songbirds with strong feet and a sharp beak that feed on small nuts and insects | Synonyms: nutcracker |
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| ophthalmectomy | (noun) surgical removal of an eye | - |
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| ophthalmia | (noun) severe conjunctivitis | Synonyms: ophthalmitis |
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| ophthalmic | (adjective) of or relating to ophthalmology | - |
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| (adjective) of or relating to or resembling the eye | Synonyms: ocular, optic, optical |
| ophthalmitis | (noun) severe conjunctivitis | Synonyms: ophthalmia |
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| ophthalmologist | (noun) a medical doctor specializing in the diagnosis and treatment of diseases of the eye | Synonyms: eye doctor, oculist |
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| ophthalmology | (noun) the branch of medicine concerned with the eye and its diseases | - |
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| ophthalmoplegia | (noun) paralysis of the motor nerves of the eye | - |
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| ophthalmoscope | (noun) medical instrument for examining the retina of the eye | - |
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| ophthalmoscopy | (noun) examination of the interior of an eye using an ophthalmoscope | - |
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| perchloromethane | (noun) a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined | Synonyms: carbon tet, carbon tetrachloride, tetrachloromethane |
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| phenolphthalein | (noun) a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 | - |
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| pleurothallis | (noun) any of numerous small tufted orchids of the genus Pleurothallis having leathery to fleshy leaves and racemes of 1 to many small flowers | - |
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| polyurethan | (noun) any of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives or plastics or paints or rubber | Synonyms: polyurethane |
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| polyurethane | (noun) any of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives or plastics or paints or rubber | Synonyms: polyurethan |
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| promethazine | (noun) antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness | Synonyms: Phenergan |
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| prothalamion | (noun) a song in celebration of a marriage | Synonyms: prothalamium |
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