| amorpha | (noun) any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers | - |
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| amorphophallus | (noun) any plant of the genus Amorphophallus | - |
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| amortisation | (noun) payment of an obligation in a series of installments or transfers | Synonyms: amortization |
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| (noun) the reduction of the value of an asset by prorating its cost over a period of years | Synonyms: amortization |
| amortization | (noun) payment of an obligation in a series of installments or transfers | Synonyms: amortisation |
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| (noun) the reduction of the value of an asset by prorating its cost over a period of years | Synonyms: amortisation |
| amour | (noun) a usually secretive or illicit sexual relationship | Synonyms: affair, affaire, intimacy, involvement, liaison |
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| amperage | (noun) the strength of an electrical current measured in amperes | - |
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| ampere | (noun) the basic unit of electric current adopted under the Systeme International d'Unites | Synonyms: A, amp |
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| (noun) a former unit of electric current (slightly smaller than the SI ampere) | Synonyms: international ampere |
| ampersand | (noun) a punctuation mark (&) used to represent conjunction (and) | - |
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| amphibrach | (noun) a metrical unit with unstressed-stressed-unstressed syllables (e.g., `remember') | - |
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| amphigory | (noun) nonsensical writing (usually verse) | Synonyms: nonsense verse |
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| amphitheater | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheatre, coliseum |
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| (noun) a sloping gallery with seats for spectators (as in an operating room or theater) | Synonyms: amphitheatre |
| amphitheatre | (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held | Synonyms: amphitheater, coliseum |
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| (noun) a sloping gallery with seats for spectators (as in an operating room or theater) | Synonyms: amphitheater |
| amphora | (noun) an ancient jar with two handles and a narrow neck; used to hold oil or wine | - |
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| amphotericin | (noun) an antibiotic and antifungal agent | - |
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| amplifier | (noun) electronic equipment that increases strength of signals passing through it | - |
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| amputator | (noun) a surgeon who removes part or all of a limb | - |
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| amrinone | (noun) a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium | Synonyms: Inocor |
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| amyotrophia | (noun) progressive wasting of muscle tissues | Synonyms: amyotrophy |
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| amyotrophy | (noun) progressive wasting of muscle tissues | Synonyms: amyotrophia |
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| anachronism | (noun) an artifact that belongs to another time | - |
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| (noun) a person who seems to be displaced in time; who belongs to another age | - |
| (noun) something located at a time when it could not have existed or occurred | Synonyms: misdating, mistiming |
| anaerobe | (noun) an organism (especially a bacterium) that does not require air or free oxygen to live | - |
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| anagram | (noun) a word or phrase spelled by rearranging the letters of another word or phrase | - |
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| anagrams | (noun) a game whose object is to form words from a group of randomly chosen letters | - |
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| analyser | (noun) an instrument that performs analyses | Synonyms: analyzer |
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| analyzer | (noun) an instrument that performs analyses | Synonyms: analyser |
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| anamorphism | (noun) a distorted projection or perspective; especially an image distorted in such a way that it becomes visible only when viewed in a special manner | Synonyms: anamorphosis |
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| (noun) metamorphism that occurs deep under the earth's surface; changes simple minerals into complex minerals | - |
| (noun) the evolution of one type of organism from another by a long series of gradual changes | Synonyms: anamorphosis |
| anamorphosis | (noun) a distorted projection or perspective; especially an image distorted in such a way that it becomes visible only when viewed in a special manner | Synonyms: anamorphism |
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| (noun) the evolution of one type of organism from another by a long series of gradual changes | Synonyms: anamorphism |
| anaphor | (noun) a word (such as a pronoun) used to avoid repetition; the referent of an anaphor is determined by its antecedent | - |
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| anaphora | (noun) using a pronoun or similar word instead of repeating a word used earlier | - |
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| (noun) repetition of a word or phrase at the beginning of successive clauses | Synonyms: epanaphora |
| anaphrodisia | (noun) decline or absence of sexual desire | - |
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| anarchism | (noun) a political theory favoring the abolition of governments | - |
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| anarchist | (noun) an advocate of anarchism | Synonyms: nihilist, syndicalist |
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| anarchy | (noun) a state of lawlessness and disorder (usually resulting from a failure of government) | Synonyms: lawlessness |
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| anarthria | (noun) partial or total loss of articulate speech resulting from lesions of the central nervous system | - |
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| anasarca | (noun) generalized edema with accumulation of serum in subcutaneous connective tissue | - |
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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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| ancestor | (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: antecedent, ascendant, ascendent, root |
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| ancestress | (noun) a woman ancestor | - |
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| ancestry | (noun) inherited properties shared with others of your bloodline | Synonyms: derivation, filiation, lineage |
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| (noun) the hereditary derivation of an individual | Synonyms: blood, blood line, bloodline, descent, line, line of descent, lineage, origin, parentage, pedigree, stemma, stock |
| anchor | (noun) a mechanical device that prevents a vessel from moving | Synonyms: ground tackle |
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| (noun) a central cohesive source of support and stability | Synonyms: backbone, keystone, linchpin, lynchpin, mainstay |
| (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchorman, anchorperson |
| anchorage | (noun) the act of anchoring | - |
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| (noun) place for vessels to anchor | Synonyms: anchorage ground |
| (noun) a fee for anchoring | - |
| (noun) the condition of being secured to a base | - |
| (noun) the provision of a sense of security or steadfastness | - |
| anchorite | (noun) one retired from society for religious reasons | Synonyms: hermit |
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| anchorman | (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchor, anchorperson |
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| anchorperson | (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchor, anchorman |
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| andiron | (noun) metal supports for logs in a fireplace | Synonyms: dog-iron, dog, firedog |
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| andradite | (noun) a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone | - |
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| andrena | (noun) a bee that is a member of the genus Andrena | Synonyms: andrenid, mining bee |
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| andrenid | (noun) a bee that is a member of the genus Andrena | Synonyms: andrena, mining bee |
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| androecium | (noun) a male gametoecium | - |
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| androgen | (noun) male sex hormone that is produced in the testes and responsible for typical male sexual characteristics | Synonyms: androgenic hormone |
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| androgenesis | (noun) male parthenogenesis in which the embryo contains only paternal chromosomes due to the failure of the egg nucleus to participate in fertilization | Synonyms: androgeny |
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| androgeny | (noun) male parthenogenesis in which the embryo contains only paternal chromosomes due to the failure of the egg nucleus to participate in fertilization | Synonyms: androgenesis |
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| androglossia | (noun) a woman's voice with male qualities | - |
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| androgyne | (noun) one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made | Synonyms: epicene, epicene person, gynandromorph, hermaphrodite, intersex |
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| androgyny | (noun) showing characteristics of both sexes | Synonyms: bisexuality, hermaphroditism |
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| android | (noun) an automaton that resembles a human being | Synonyms: humanoid, mechanical man |
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| (noun) An operating system from Google for mobile devices | - |
| andromeda | (noun) any of several shrubs of the genus Andromeda having leathery leaves and clusters of small flowers | - |
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| (noun) broad-leaved evergreen Asiatic shrub with glossy leaves and drooping clusters of white flowers | Synonyms: Japanese andromeda, lily-of-the-valley tree, Pieris japonica |
| androphobia | (noun) a morbid fear of men | - |
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| androsterone | (noun) an androgenic hormone that is less active than testosterone | - |
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| andryala | (noun) any plant of the genus Andryala having milky sap and heads of bright yellow flowers | - |
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| anemoclinometer | (noun) A type of instrument which measures the inclination of the wind to the horizontal plane. | - |
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| anemograph | (noun) An instrument which records wind velocities. | - |
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| anemography | (noun) recording anemometrical measurements | - |
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| anemometer | (noun) a gauge for recording the speed and direction of wind | Synonyms: wind gage, wind gauge |
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| anemometry | (noun) measuring wind speed and direction | - |
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| anergy | (noun) reduction or lack of an immune response to a specific antigen | - |
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| (noun) inactivity and lack of energy | - |
| aneroid | (noun) a barometer that measures pressure without using fluids | Synonyms: aneroid barometer |
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| anestrum | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrus, anoestrum, anoestrus |
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| anestrus | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrum, anoestrum, anoestrus |
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| aneurin | (noun) a B vitamin that prevents beriberi; maintains appetite and growth | Synonyms: antiberiberi factor, thiamin, thiamine, vitamin B1 |
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| aneurism | (noun) a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall | Synonyms: aneurysm |
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| aneurysm | (noun) a cardiovascular disease characterized by a saclike widening of an artery resulting from weakening of the artery wall | Synonyms: aneurism |
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| anger | (noun) belligerence aroused by a real or supposed wrong (personified as one of the deadly sins) | Synonyms: ira, ire, wrath |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: choler, ire |
| (noun) the state of being angry | Synonyms: angriness |
| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| angiocarp | (noun) tree bearing fruit enclosed in a shell or involucre or husk | - |
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| angiogram | (noun) an X-ray representation of blood vessels made after the injection of a radiopaque substance | - |
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| angiography | (noun) roentgenographic examination of blood vessels after injection of a radiopaque contrast medium; produces an angiogram | - |
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| angiopteris | (noun) highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfall | Synonyms: Angiopteris evecta, giant fern |
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| angiosarcoma | (noun) a rare malignant neoplasm arising from vascular tissue; usually occurs in the breast and skin and is believed to originate from the endothelial cells of blood vessels | - |
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| angiosperm | (noun) plants having seeds in a closed ovary | Synonyms: flowering plant |
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| angledozer | (noun) a bulldozer with an angled moldboard to push earth to one side | - |
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| angler | (noun) fishes having large mouths with a wormlike filament attached for luring prey | Synonyms: allmouth, angler fish, anglerfish, goosefish, Lophius Americanus, lotte, monkfish |
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| (noun) a fisherman who uses a hook and line | Synonyms: troller |
| (noun) a scheming person; someone who schemes to gain an advantage | - |
| anglerfish | (noun) fishes having large mouths with a wormlike filament attached for luring prey | Synonyms: allmouth, angler, angler fish, goosefish, Lophius Americanus, lotte, monkfish |
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| angleworm | (noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | Synonyms: crawler, dew worm, earthworm, fishing worm, fishworm, nightcrawler, nightwalker, red worm, wiggler |
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| angostura | (noun) the bitter bark of a South American tree; used in medicines and liqueurs and bitters | Synonyms: angostura bark |
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| angrecum | (noun) any of various spectacular orchids of the genus Angraecum having dark green leathery leaves and usually nocturnally scented white or ivory flowers | - |
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| angriness | (noun) the state of being angry | Synonyms: anger |
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| angstrom | (noun) a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation | Synonyms: A, angstrom unit |
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| angularity | (noun) the property possessed by a shape that has angles | - |
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| (noun) a shape having one or more sharp angles | Synonyms: angular shape |
| anhidrosis | (noun) failure of the sweat glands | Synonyms: anhydrosis |
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| anhydride | (noun) a compound formed from one or more other compounds in a reaction resulting in removal of water | - |
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| anhydrosis | (noun) failure of the sweat glands | Synonyms: anhidrosis |
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| animadversion | (noun) harsh criticism or disapproval | Synonyms: censure |
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| animator | (noun) the technician who produces animated cartoons | - |
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| (noun) someone who imparts energy and vitality and spirit to other people | Synonyms: energiser, energizer, vitaliser, vitalizer |
| animatronics | (noun) the construction of robots to look like animals (developed for Disneyland) | - |
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| anisometropia | (noun) difference in the refractive power of the two eyes | - |
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| anisotropy | (noun) the property of being anisotropic; having a different value when measured in different directions | - |
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| ankylosaur | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaurus |
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| ankylosaurus | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaur |
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| annihilator | (noun) a total destroyer | - |
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