| 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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| acetophenetidin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetphenetidin, phenacetin |
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| acetphenetidin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetophenetidin, phenacetin |
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| aminopherase | (noun) a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound) | Synonyms: aminotransferase, transaminase |
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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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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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| anopheline | (noun) any mosquito of the genus Anopheles | - |
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| antistrophe | (noun) the section of a choral ode answering a previous strophe in classical Greek drama; the second of two metrically corresponding sections in a poem | - |
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| aphelion | (noun) apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun | - |
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| apheresis | (noun) a procedure in which blood is drawn and separated into its components by dialysis; some are retained and the rest are returned to the donor by transfusion | Synonyms: pheresis |
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| (noun) (linguistics) omission at the beginning of a word as in `coon' for `raccoon' or `till' for `until' | Synonyms: aphaeresis |
| aphesis | (noun) the gradual disappearance of an initial (usually unstressed) vowel or syllable as in `squire' for `esquire' | - |
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| apostrophe | (noun) address to an absent or imaginary person | - |
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| (noun) the mark (') used to indicate the omission of one or more letters from a printed word | - |
| asthenosphere | (noun) the lower layer of the crust | - |
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| atmosphere | (noun) a distinctive but intangible quality surrounding a person or thing | Synonyms: air, aura |
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| (noun) the mass of air surrounding the Earth | Synonyms: air |
| (noun) the envelope of gases surrounding any celestial body | - |
| (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atm, standard atmosphere, standard pressure |
| (noun) the weather or climate at some place | Synonyms: atmospheric state |
| (noun) a particular environment or surrounding influence | Synonyms: ambiance, ambience |
| atmospherics | (noun) a crackling or hissing noise caused by electrical interference | Synonyms: atmospheric static, static |
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| atrophedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: angioedema, giant hives, periodic edema, Quincke's edema |
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| autobiographer | (noun) someone who writes their own biography | - |
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| bathyscaphe | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaph |
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| bathysphere | (noun) spherical deep diving apparatus (lowered by a cable) for underwater exploration | - |
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| bibliographer | (noun) someone trained in compiling bibliographies | - |
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| biographer | (noun) someone who writes an account of a person's life | - |
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| biosphere | (noun) the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist | - |
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| blasphemer | (noun) a person who speaks disrespectfully of sacred things | - |
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| blasphemy | (noun) blasphemous behavior; the act of depriving something of its sacred character | Synonyms: desecration, profanation, sacrilege |
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| (noun) blasphemous language (expressing disrespect for God or for something sacred) | - |
| blastosphere | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastula |
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| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| calligrapher | (noun) someone skilled in penmanship | Synonyms: calligraphist |
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| cartographer | (noun) a person who makes maps | Synonyms: map maker |
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| catastrophe | (noun) an event resulting in great loss and misfortune | Synonyms: calamity, cataclysm, disaster, tragedy |
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| (noun) a sudden violent change in the earth's surface | Synonyms: cataclysm |
| (noun) a state of extreme (usually irremediable) ruin and misfortune | Synonyms: disaster |
| chloramphenicol | (noun) an oral antibiotic (trade name Chloromycetin) used to treat serious infections (especially typhoid fever) | Synonyms: Chloromycetin |
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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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| choreographer | (noun) someone who creates new dances | - |
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| chromosphere | (noun) a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun | - |
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| cinematographer | (noun) a photographer who operates a movie camera | Synonyms: camera operator, cameraman |
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| cipher | (noun) a secret method of writing | Synonyms: cryptograph, cypher, secret code |
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| (noun) a message written in a secret code | Synonyms: cypher |
| (noun) a person of no influence | Synonyms: cypher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cypher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cypher, nought, zero |
| clomiphene | (noun) a fertility drug (trade name Clomid) that is used to stimulate ovulation and that has been associated with multiple births | Synonyms: Clomid, clomiphene citrate |
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| cosmographer | (noun) a scientist knowledgeable about cosmography | Synonyms: cosmographist |
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| cryptographer | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptologist |
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| crystallographer | (noun) a specialist in crystallography | - |
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| cypher | (noun) a secret method of writing | Synonyms: cipher, cryptograph, secret code |
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| (noun) a message written in a secret code | Synonyms: cipher |
| (noun) a person of no influence | Synonyms: cipher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, nought, zero |
| decipherer | (noun) a reader capable of reading and interpreting illegible or obscure text | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decoder |
| decipherment | (noun) the activity of making clear or converting from code into plain text | Synonyms: decoding, decryption |
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| demographer | (noun) a scientist who studies the growth and density of populations and their vital statistics | Synonyms: demographist, population scientist |
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| deoxyephedrine | (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, glass, ice, meth, methamphetamine, methamphetamine hydrochloride, Methedrine, shabu, trash |
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| diapheromera | (noun) a variety of stick insect | Synonyms: Diapheromera femorata |
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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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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| diphenhydramine | (noun) antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness | Synonyms: Benadryl |
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| diphenylhydantoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, phenytoin |
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| dysphemism | (noun) an offensive or disparaging expression that is substituted for an inoffensive one | - |
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| ephebeia | (noun) in ancient Greece, a state institution organized to train freeborn youths between the ages of 18 and 20 for military and administrative service. | - |
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| ephedra | (noun) jointed and nearly leafless desert shrub having reduced scalelike leaves and reddish fleshy seeds | Synonyms: joint fir |
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| ephedrine | (noun) white odorless powdered or crystalline alkaloid from plants of the genus Ephedra (especially Ephedra sinica) or made synthetically; used as a bronchodilator to treat bronchitis and asthma | - |
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| ephemera | (noun) something transitory; lasting a day | - |
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| ephemeral | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeron |
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| ephemerality | (noun) the property of lasting for a very short time | Synonyms: ephemeralness, fleetingness |
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| ephemeralness | (noun) the property of lasting for a very short time | Synonyms: ephemerality, fleetingness |
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| ephemerid | (noun) short-lived insect | Synonyms: ephemeropteran |
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| ephemeris | (noun) an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year | - |
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| ephemeron | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeral |
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| ephemeropteran | (noun) short-lived insect | Synonyms: ephemerid |
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| epiphenomenon | (noun) a secondary phenomenon that is a by-product of another phenomenon | - |
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| epistrophe | (noun) repetition of the ends of two or more successive sentences, verses, etc. | Synonyms: epiphora |
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| ethnographer | (noun) an anthropologist who does ethnography | - |
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| euphemism | (noun) an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh | - |
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| exosphere | (noun) the outermost atmospheric layer | - |
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| fluphenazine | (noun) tranquilizer used to treat psychotic disorders | - |
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| geographer | (noun) an expert on geography | - |
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| geosphere | (noun) the solid part of the earth consisting of the crust and outer mantle | Synonyms: lithosphere |
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| gopher | (noun) burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America | Synonyms: pocket gopher, pouched rat |
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| (noun) burrowing edible land tortoise of southeastern North America | Synonyms: gopher tortoise, gopher turtle, Gopherus polypemus |
| (noun) any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops | Synonyms: ground squirrel, spermophile |
| (noun) a zealously energetic person (especially a salesman) | Synonyms: goffer |
| gopherwood | (noun) small handsome roundheaded deciduous tree having showy white flowers in terminal clusters and heavy hardwood yielding yellow dye | Synonyms: Cladrastis kentukea, Cladrastis lutea, Kentucky yellowwood |
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| grandnephew | (noun) a son of your niece or nephew | Synonyms: great-nephew |
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| grapheme | (noun) a written symbol that is used to represent speech | Synonyms: character, graph, graphic symbol |
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| hagiographer | (noun) the author of a worshipful or idealizing biography | Synonyms: hagiographist, hagiologist |
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| heliosphere | (noun) the region inside the heliopause containing the sun and solar system | - |
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| hemisphere | (noun) either half of the cerebrum | Synonyms: cerebral hemisphere |
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| (noun) half of the terrestrial globe | - |
| (noun) half of a sphere | - |
| hexachlorophene | (noun) antibacterial substance that is a water-soluble powder used in antiseptic soaps and toothpaste | - |
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| historiographer | (noun) a person who is an authority on history and who studies it and writes about it | Synonyms: historian |
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| hydrosphere | (noun) the watery layer of the earth's surface; includes water vapor | - |
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| hyphema | (noun) bleeding into the interior chamber of the eye | - |
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| hyphen | (noun) a punctuation mark (-) used between parts of a compound word or between the syllables of a word when the word is divided at the end of a line of text | Synonyms: dash |
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| hyphenation | (noun) connecting syllables and words by hyphens | - |
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| (noun) division of a word especially at the end of a line on a page | Synonyms: word division |
| ionosphere | (noun) the outer region of the Earth's atmosphere; contains a high concentration of free electrons | - |
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| isophene | (noun) a line indicating biological events occurring with coincidence such as plants flowering. | - |
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| lexicographer | (noun) a compiler or writer of a dictionary; a student of the lexical component of language | Synonyms: lexicologist |
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| lithographer | (noun) a printmaker who uses lithography | - |
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| lithosphere | (noun) the solid part of the earth consisting of the crust and outer mantle | Synonyms: geosphere |
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| lymphedema | (noun) swelling (usually in the legs) caused by lymph accumulating in the tissues in the affected areas | - |
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| magnetosphere | (noun) the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field | - |
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| mephenytoin | (noun) a toxic anticonvulsant drug (trade name Mesantoin) used in the treatment of epilepsy when less toxic anticonvulsants have been ineffective | Synonyms: Mesantoin |
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| mesosphere | (noun) the atmospheric layer between the stratosphere and the thermosphere | - |
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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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| 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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| methylphenidate | (noun) central nervous system stimulant (trade name Ritalin) used in the treatment of narcolepsy in adults and attention deficit disorder in children | Synonyms: Ritalin |
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| morphea | (noun) localized scleroderma | - |
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| morpheme | (noun) minimal meaningful language unit; it cannot be divided into smaller meaningful units | - |
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| nepheline | (noun) a whitish mineral consisting of sodium aluminum silicate or potassium aluminum silicate in crystalline form; used in the manufacture of ceramics and enamels | Synonyms: nephelite |
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| nephelinite | (noun) an igneous rock consisting of nepheline and pyroxene | - |
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| nephelite | (noun) a whitish mineral consisting of sodium aluminum silicate or potassium aluminum silicate in crystalline form; used in the manufacture of ceramics and enamels | Synonyms: nepheline |
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| nephew | (noun) a son of your brother or sister | - |
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