| acetamide | (noun) a colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds | Synonyms: ethanamide |
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| acetaminophen | (noun) an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets) | Synonyms: Anacin III, Datril, Panadol, Phenaphen, Tempra, Tylenol |
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| amphetamine | (noun) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression | Synonyms: pep pill, speed, upper |
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| antihistamine | (noun) a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site | - |
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| aspartame | (noun) an artificial sweetener made from aspartic acid; used as a calorie-free sweetener | - |
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| avitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: hypovitaminosis |
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| avitaminotic | (adjective) of or relating to or characteristic of avitaminosis | - |
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| bantam | (adjective) very small | Synonyms: diminutive, flyspeck, lilliputian, midget, petite, tiny |
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| (noun) any of various small breeds of fowl | - |
| bantamweight | (noun) A weight class division in combat sports, for fighters heavier than those in the flyweight division and lighter than those in the featherweight division. | - |
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| (noun) an amateur boxer who weighs no more than 119 pounds | - |
| (noun) weighs 115-126 pounds | - |
| catamaran | (noun) a boat with two parallel hulls held together by single deck | - |
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| catamenia | (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: flow, menses, menstruation, menstruum, period |
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| catamenial | (adjective) of or relating to menstruation or the menses | Synonyms: menstrual |
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| catamite | (noun) a boy who submits to a sexual relationship with a man | - |
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| catamount | (noun) large American feline resembling a lion | Synonyms: cougar, Felis concolor, mountain lion, painter, panther, puma |
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| (noun) short-tailed wildcats with usually tufted ears; valued for their fur | Synonyms: lynx |
| catamountain | (noun) bushy-tailed wildcat of Europe that resembles the domestic cat and is regarded as the ancestor of the domestic cat | Synonyms: European wildcat, Felis silvestris |
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| chittamwood | (noun) deciduous tree of southeastern United States and Mexico | Synonyms: black haw, Bumelia lanuginosa, chittimwood, false buckthorn, shittimwood |
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| (noun) shrubby tree of the Pacific coast of the United States; yields cascara sagrada | Synonyms: bearberry, bearwood, cascara buckthorn, chittimwood, Rhamnus purshianus |
| (noun) shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke | Synonyms: American smokewood, Cotinus americanus, Cotinus obovatus |
| contaminant | (noun) a substance that contaminates | Synonyms: contamination |
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| contaminate | (verb) make impure | Synonyms: foul, pollute |
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| (verb) make radioactive by adding radioactive material | - |
| contaminated | (adjective) corrupted by contact or association | - |
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| (adjective) rendered unwholesome by contaminants and pollution | Synonyms: polluted |
| contaminating | (adjective) spreading pollution or contamination; especially radioactive contamination | Synonyms: dirty |
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| (adjective) that infects or taints | Synonyms: corrupting |
| contamination | (noun) the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors | Synonyms: pollution |
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| (noun) the state of being contaminated | Synonyms: taint |
| (noun) a substance that contaminates | Synonyms: contaminant |
| contaminative | (adjective) making impure by contact or mixing | - |
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| decontaminate | (verb) rid of contamination | - |
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| decontamination | (noun) the removal of contaminants | - |
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| ergotamine | (noun) an alkaloid derived from ergot that is less toxic than ergot; causes constriction of blood vessels and is used to treat migraine | - |
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| estaminet | (noun) a small (and usually shabby) cafe selling wine and beer and coffee | - |
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| etamin | (noun) a soft cotton or worsted fabric with an open mesh; used for curtains or clothing etc. | Synonyms: etamine |
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| etamine | (noun) a soft cotton or worsted fabric with an open mesh; used for curtains or clothing etc. | Synonyms: etamin |
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| gentamicin | (noun) an antibiotic (trade name Garamycin) that is derived from an actinomycete; used in treating infections of the urinary tract | Synonyms: Garamycin |
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| glutamate | (noun) a salt or ester of glutamic acid | - |
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| glutamine | (noun) a crystalline amino acid occurring in proteins; important in protein metabolism | - |
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| handstamp | (noun) a stamp (usually made of rubber) for imprinting a mark or design by hand | Synonyms: rubber stamp |
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| (verb) stamp with a rubber stamp, usually an indication of official approval on a document | Synonyms: rubberstamp |
| hemimetamorphic | (adjective) (of an insect with aquatic young) undergoing incomplete metamorphosis in which the young does not resemble the adult | Synonyms: hemimetabolic, hemimetabolous, hemimetamorphous |
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| hemimetamorphosis | (noun) incomplete or partial metamorphosis in insects | Synonyms: hemimetabolism, hemimetaboly |
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| hemimetamorphous | (adjective) (of an insect with aquatic young) undergoing incomplete metamorphosis in which the young does not resemble the adult | Synonyms: hemimetabolic, hemimetabolous, hemimetamorphic |
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| hereditament | (noun) any property (real or personal or mixed) that can be inherited | - |
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| hippopotamus | (noun) massive thick-skinned herbivorous animal living in or around rivers of tropical Africa | Synonyms: hippo, Hippopotamus amphibius, river horse |
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| histaminase | (noun) enzyme that acts as a catalyst in converting histidine to histamine | - |
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| histamine | (noun) amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the human immune system during allergic reactions | - |
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| hypervitaminosis | (noun) an abnormal condition resulting from taking vitamins excessively; can be serious for vitamins A or D or K | - |
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| hypovitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: avitaminosis |
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| katamorphism | (noun) metamorphism that occurs at or near the earth's surface; breaks down complex minerals into simpler ones | - |
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| ketamine | (noun) a general anesthetic and tranquilizer (not a barbiturate) that is administered intravenously or intramuscularly; used mainly by veterinarians or for minor surgery with geriatric or pediatric patients; taken in large doses it causes hallucinations similar to those associated with the use of PCP | Synonyms: Ketalar, ketamine hydrochloride |
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| kitambilla | (noun) maroon-purple gooseberry-like fruit of India having tart-sweet purple pulp used especially for preserves | Synonyms: ketembilla, kitembilla |
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| (noun) a small shrubby spiny tree cultivated for its maroon-purple fruit with sweet purple pulp tasting like gooseberries; Sri Lanka and India | Synonyms: Ceylon gooseberry, Dovyalis hebecarpa, ketembilla, ketembilla tree, kitembilla |
| metamathematics | (noun) the logical analysis of mathematical reasoning | - |
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| metamere | (noun) one of a series of similar body segments into which some animals are divided longitudinally | Synonyms: somite |
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| metameric | (adjective) having the body divided into successive metameres or segments, as in earthworms or lobsters | Synonyms: segmental, segmented |
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| metamorphic | (adjective) characterized by metamorphosis or change in physical form or substance | - |
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| (adjective) of or relating to metamorphosis (especially of rocks) | Synonyms: metamorphous |
| metamorphism | (noun) change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances | - |
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| metamorphopsia | (noun) a defect of vision in which objects appear to be distorted; usually due to a defect in the retina | - |
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| metamorphose | (verb) change completely the nature or appearance of | Synonyms: transfigure, transmogrify |
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| (verb) change in outward structure or looks | Synonyms: transform, transmute |
| metamorphosis | (noun) a complete change of physical form or substance especially as by magic or witchcraft | - |
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| (noun) a striking change in appearance or character or circumstances | Synonyms: transfiguration |
| (noun) the marked and rapid transformation of a larva into an adult that occurs in some animals | Synonyms: metabolism |
| metamorphous | (adjective) of or relating to metamorphosis (especially of rocks) | Synonyms: metamorphic |
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| (adjective) produced by metamorphosis | - |
| 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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| 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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| multivitamin | (noun) a pill or tablet containing several vitamins | Synonyms: multivitamin pill |
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| noctambulation | (noun) walking by a person who is asleep | Synonyms: noctambulism, sleepwalking, somnambulation, somnambulism |
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| noctambulism | (noun) walking by a person who is asleep | Synonyms: noctambulation, sleepwalking, somnambulation, somnambulism |
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| noctambulist | (noun) someone who walks about in their sleep | Synonyms: sleepwalker, somnambulist |
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| nonmetamorphic | (adjective) not metamorphic | - |
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| octameter | (noun) a verse line having eight metrical feet | - |
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| pentamerous | (adjective) divided into five parts; specifically, having each floral whorl consist of five (or a multiple of five) members | - |
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| pentameter | (noun) a verse line having five metrical feet | - |
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| pentamethylenetetrazol | (noun) a drug used as a circulatory and respiratory stimulant; larger doses cause convulsions in shock therapy; Metrazol is a trademark | Synonyms: Metrazol, pentylenetetrazol |
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| phenylacetamide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, acetanilide |
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| potamogale | (noun) amphibious African insectivorous mammal that resembles an otter | Synonyms: otter shrew, Potamogale velox |
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| potamoplankton | (noun) plankton that inhabit rivers | - |
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| protamine | (noun) a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin | - |
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| provitamin | (noun) vitamin precursor; a substance that is converted into a vitamin in animal tissues | - |
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| putamen | (noun) the outer reddish part of the lenticular nucleus | - |
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| raetam | (noun) desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista | Synonyms: Genista raetam, juniper, juniper bush, Retama raetam, retem |
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| rubberstamp | (verb) approve automatically | - |
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| (verb) stamp with a rubber stamp, usually an indication of official approval on a document | Synonyms: handstamp |
| stamen | (noun) the male reproductive organ of a flower | - |
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| stamina | (noun) enduring strength and energy | Synonyms: staying power, toughness |
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| staminate | (adjective) capable of fertilizing female organs | Synonyms: antheral |
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| stammel | (noun) a coarse woolen cloth formerly used for undergarments and usually dyed bright red | - |
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| stammer | (noun) a speech disorder involving hesitations and involuntary repetitions of certain sounds | Synonyms: stutter |
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| (verb) speak haltingly | Synonyms: bumble, falter, stutter |
| stammerer | (noun) someone who speaks with involuntary pauses and repetitions | Synonyms: stutterer |
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| stamp | (noun) a device incised to make an impression; used to secure a closing or to authenticate documents | Synonyms: seal |
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| (noun) a block or die used to imprint a mark or design | - |
| (noun) machine consisting of a heavy bar that moves vertically for pounding or crushing ores | Synonyms: pestle |
| (noun) a symbol that is the result of printing or engraving | Synonyms: impression |
| (noun) a small adhesive token stuck on a letter or package to indicate that postal fees have been paid | Synonyms: postage, postage stamp |
| (noun) a small piece of adhesive paper that is put on an object to show that a government tax has been paid | Synonyms: revenue stamp |
| (noun) a type or class | - |
| (noun) something that can be used as an official medium of payment | Synonyms: legal tender, tender |
| (noun) the distinctive form in which a thing is made | Synonyms: cast, mold, mould |
| (verb) destroy or extinguish as if by stamping with the foot | - |
| (verb) treat or classify according to a mental stereotype | Synonyms: pigeonhole, stereotype |
| (verb) to mark, or produce an imprint in or on something | - |
| (verb) affix a stamp to | - |
| (verb) raise in a relief | Synonyms: boss, emboss |
| (verb) crush or grind with a heavy instrument | - |
| (verb) form or cut out with a mold, form, or die | - |
| (verb) walk heavily | Synonyms: stomp, stump |
| (verb) reveal clearly as having a certain character | - |
| stampede | (noun) a headlong rush of people on a common impulse | - |
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| (noun) a wild headlong rush of frightened animals (horses or cattle) | - |
| (verb) run away in a stampede | - |
| (verb) cause to run in panic | - |
| (verb) act, usually en masse, hurriedly or on an impulse | - |
| (verb) cause a group or mass of people to act on an impulse or hurriedly and impulsively | - |
| stamper | (noun) a power tool that stamps | Synonyms: stamping machine |
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| (noun) someone who walks with a heavy noisy gait or who stamps on the ground | Synonyms: stomper, tramper, trampler |
| (noun) a workman whose job is to form or cut out by applying a mold or die (either by hand or by operating a stamping machine) | - |
| sulfacetamide | (noun) a topical sulfonamide (trade name Sulamyd) used to treat eye infections | Synonyms: Sulamyd |
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| tam | (noun) a woolen cap of Scottish origin | Synonyms: tam-o'-shanter, tammy |
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| tamable | (adjective) capable of being tamed | Synonyms: tameable |
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| tamal | (noun) dough stuffed with a meat mixture and sometimes wrapped in corn husks and steamed | Synonyms: tamale |
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| tamale | (noun) dough stuffed with a meat mixture and sometimes wrapped in corn husks and steamed | Synonyms: tamal |
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| tamandu | (noun) small toothless anteater with prehensile tail and four-clawed forelimbs; of tropical South America and Central America | Synonyms: lesser anteater, tamandua, Tamandua tetradactyla |
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| tamandua | (noun) small toothless anteater with prehensile tail and four-clawed forelimbs; of tropical South America and Central America | Synonyms: lesser anteater, tamandu, Tamandua tetradactyla |
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| tamanoir | (noun) large shaggy-haired toothless anteater with long tongue and powerful claws; of South America | Synonyms: ant bear, giant anteater, great anteater, Myrmecophaga jubata |
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| tamarack | (noun) medium-sized larch of Canada and northern United States including Alaska having a broad conic crown and rust-brown scaly bark | Synonyms: American larch, black larch, Larix laricina |
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| tamarao | (noun) small buffalo of Mindoro in the Philippines | Synonyms: Anoa mindorensis, Bubalus mindorensis, tamarau |
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| tamarau | (noun) small buffalo of Mindoro in the Philippines | Synonyms: Anoa mindorensis, Bubalus mindorensis, tamarao |
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| tamarillo | (noun) South American arborescent shrub having pale pink blossoms followed by egg-shaped reddish-brown edible fruit somewhat resembling a tomato | Synonyms: tree tomato |
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| tamarin | (noun) small South American marmoset with silky fur and long nonprehensile tail | Synonyms: leoncita, lion marmoset, lion monkey |
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| tamarind | (noun) large tropical seed pod with very tangy pulp that is eaten fresh or cooked with rice and fish or preserved for curries and chutneys | Synonyms: tamarindo |
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| (noun) long-lived tropical evergreen tree with a spreading crown and feathery evergreen foliage and fragrant flowers yielding hard yellowish wood and long pods with edible chocolate-colored acidic pulp | Synonyms: tamarind tree, tamarindo, Tamarindus indica |
| tamarindo | (noun) large tropical seed pod with very tangy pulp that is eaten fresh or cooked with rice and fish or preserved for curries and chutneys | Synonyms: tamarind |
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| (noun) long-lived tropical evergreen tree with a spreading crown and feathery evergreen foliage and fragrant flowers yielding hard yellowish wood and long pods with edible chocolate-colored acidic pulp | Synonyms: tamarind, tamarind tree, Tamarindus indica |
| tamarisk | (noun) any shrub or small tree of the genus Tamarix having small scalelike or needle-shaped leaves and feathery racemes of small white or pinkish flowers; of mostly coastal areas with saline soil | - |
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| tambac | (noun) an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding | Synonyms: tombac, tombak |
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| tambala | (noun) 100 tambala equal 1 kwacha in Malawi | - |
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| tambour | (noun) a drum | - |
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| (noun) a frame made of two hoops; used for embroidering | Synonyms: embroidery frame, embroidery hoop |