H
1: a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe [syn: {hydrogen}, {atomi...
H-bomb
1: a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium [syn: {hydrogen bomb}, {fusion bomb}, {thermonuclear bomb}]
H-shaped
1: shaped in the form of the letter H
H. G. Wells
1: prolific English writer best known for his science-fiction novels; he also wrote on contemporary social problems and wrote popular accounts of history and science (1866-1946) [syn: {Wells}, {Herber...
H. H. Munro
1: British writer of short stories (1870-1916) [syn: {Munro}, {Hector Hugh Munro}, {Saki}]
H. J. Eysenck
1: a British psychologist (born in Germany) noted for his theories of intelligence and personality and for his strong criticism of Freudian psychoanalysis [syn: {Eysenck}, {Hans Eysenck}, {Hans Jurgen...
H. L. Mencken
1: United States journalist and literary critic (1880-1956) [syn: {Mencken}, {Henry Louis Mencken}]
H. pylori
1: the type species of genus Heliobacter; produces urease and is associated with several gastroduodenal diseases (including gastritis and gastric ulcers and duodenal ulcers and other peptic ulcers) [s...
H.M.S. Bounty
1: a ship of the British navy; in 1789 part of the crew mutineed against their commander William Bligh and set him afloat in an open boat [syn: {Bounty}]
H.P.
1: a unit of power equal to 746 watts [syn: {horsepower}, {HP}]
H2O
1: binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a ...
HA
1: (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time o...
ha'p'orth
1: the amount that can be bought for a halfpenny [syn: {halfpennyworth}]
ha'penny
1: an English coin worth half a penny [syn: {halfpenny}]
ha-ha
1: a loud laugh that sounds like a horse neighing [syn: {hee-haw}, {horselaugh}, {haw-haw}] 2: a ditch with one side being a retaining wall; used to divide lands without defacing the landscape [syn: {...
HAART
1: a combination of protease inhibitors taken with reverse transcriptase inhibitors; used in treating AIDS and HIV [syn: {drug cocktail}, {highly active antiretroviral therapy}]
Haastia
1: genus of New Zealand mat-forming herbs or subshrubs: vegetable sheep [syn: {genus Haastia}]
Haastia pulvinaris
1: cushion-forming New Zealand herb having leaves densely covered with tawny hairs [syn: {vegetable sheep}, {sheep plant}]
Habacuc
1: an Old Testament book tellin Habakkuk's prophecies [syn: {Habakkuk}, {Book of Habakkuk}]
Habakkuk
1: a Hebrew minor prophet 2: an Old Testament book tellin Habakkuk's prophecies [syn: {Habacuc}, {Book of Habakkuk}]
habanera
1: music composed in duple time for dancing the habanera 2: a Cuban dance in duple time
habeas corpus
1: a writ ordering a prisoner to be brought before a judge [syn: {writ of habeas corpus}] 2: the civil right to obtain a writ of habeas corpus as protection against illegal imprisonment
Habenaria
1: chiefly terrestrial orchids with tubers or fleshy roots often having long slender spurs and petals and lip lobes; includes species formerly placed in genus Gymnadeniopsis [syn: {genus Habenaria}]
Habenaria albiflora
1: bog orchid of eastern North America with a spike of pure white fringed flowers [syn: {white fringed orchis}, {white fringed orchid}]
Habenaria bifolia
1: south European orchid having fragrant greenish-white flowers; sometimes placed in genus Habenaria [syn: {lesser butterfly orchid}, {Platanthera bifolia}]
Habenaria chlorantha
1: south European orchid with dark green flowers that are larger and less fragrant than Platanthera bifolia; sometimes placed in genus Habenaria [syn: {greater butterfly orchid}, {Platanthera chlorant...
Habenaria dilatata
1: orchid with spikes of many fragrant white flowers on erect leafy stems; of wet or boggy ground through most of the West and northern North America [syn: {bog rein orchid}, {bog candles}]
Habenaria elegans
1: slender inland rein orchid similar to coastal rein orchid but with pale greenish-yellow flowers [syn: {elegant Habenaria}]
Habenaria fimbriata
1: North American orchid similar to Habenaria psycodes with larger paler flowers [syn: {purple-fringed orchid}, {purple-fringed orchis}]
Habenaria greenei
1: stout orchid of central California to northern Washington having racemes of white fragrant bilaterally symmetrical flowers [syn: {coastal rein orchid}]
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Habenaria hookeri
1: a long-spurred orchid with base leaves and petals converging under the upper sepal [syn: {Hooker's orchid}]
Habenaria lacera
1: fringed orchid of the eastern United States having a greenish flower with the lip deeply lacerate [syn: {ragged orchid}, {ragged orchis}, {ragged-fringed orchid}, {green fringed orchis}]
Habenaria leucophaea
1: orchid of boggy or wet lands of north central United States having racemes of very fragrant creamy or greenish white flowers [syn: {prairie orchid}, {prairie white-fringed orchis}]
Habenaria nivea
1: slender fringed orchid of eastern North America having white flowers [syn: {snowy orchid}]
Habenaria orbiculata
1: orchid having a raceme of large greenish-white flowers on a single flower stalk growing between two elliptic or round basal leaves lying on the ground; from northern Oregon and Montana across Canad...
Habenaria peramoena
1: orchid of northeastern and alpine eastern North America closely related to the purple fringed orchids but having rosy-purple or violet flowers with denticulate leaf divisions [syn: {purple fringele...
Habenaria psycodes
1: North American orchid with clusters of fragrant purple fringed flowers [syn: {purple-fringed orchid}, {purple-fringed orchis}]
Habenaria unalascensis
1: similar to coastal rein orchid but with smaller flowers; Alaska to Baja California and east to the Dakotas and Colorado [syn: {Alaska rein orchid}]
Haber
1: German chemist noted for the synthetic production of ammonia from the nitrogen in air (1868-1934) [syn: {Fritz Haber}]
Haber process
1: an industrial process for producing ammonia from nitrogen and hydrogen by combining them under high pressure in the present of an iron catalyst [syn: {Haber-Bosch process}]
Haber-Bosch process
1: an industrial process for producing ammonia from nitrogen and hydrogen by combining them under high pressure in the present of an iron catalyst [syn: {Haber process}]
haberdasher
1: a merchant who sells men's clothing [syn: {clothier}]
haberdashery
1: a store where men's clothes are sold [syn: {clothing store}, {haberdashery store}, {mens store}] 2: the drygoods sold by a haberdasher [syn: {men's furnishings}]
haberdashery store
1: a store where men's clothes are sold [syn: {clothing store}, {haberdashery}, {mens store}]
habergeon
1: (Middle Ages) a light sleeveless coat of chain mail worn under the hauberk
habilimented
1: dressed or clothed especially in fine attire; often used in combination; "the elegantly attired gentleman"; "neatly dressed workers"; "monks garbed in hooded robes"; "went about oddly garmented"; "...
habilitate
1: qualify for teaching at a university in Europe; "He habilitated after his sabbatical at a prestigious American university" 2: provide with clothes or put clothes on; "Parents must feed and dress th...
habit
1: an established custom; "it was their habit to dine at 7 every evening" [syn: {wont}] 2: a pattern of behavior acquired through frequent repetition; "she had a habit twirling the ends of her hair"; ...
habit-forming
1: causing or characterized by addiction; "addictive drugs"; "addictive behavior" [syn: {addictive}] [ant: {nonaddictive}]
habitable
1: fit for habitation; "the habitable world" [syn: {inhabitable}]
habitat
1: the type of environment in which an organism or group normally lives or occurs; "a marine habitat"; "he felt safe on his home grounds" [syn: {home ground}]
habitation
1: the native habitat or home of an animal or plant 2: housing that someone is living in; "he built a modest dwelling near the pond"; "they raise money to provide homes for the homeless" [syn: {dwelli...
habited
1: dressed in a habit; "the habited men of the monastery"
habitual
1: made a norm or custom or habit; "his habitual practice was to eat an early supper"; "her habitual neatness" 2: commonly used or practiced; usual; "his accustomed thoroughness"; "took his customary ...
habitual criminal
1: someone who is repeatedly arrested for criminal behavior (especially for the same criminal behavior) [syn: {recidivist}, {repeater}]
habitually
1: according to routine or established practice; "he routinely parked in a no-parking zone" [syn: {routinely}] 2: according to habit or custom; "her habitually severe expression"; "he habitually keeps...
habituate
1: take or consume (regularly or habitually); "She uses drugs rarely" [syn: {use}] 2: make psychologically or physically used (to something); "She became habituated to the background music" [syn: {acc...
habituation
1: being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) [syn: {addiction}, {dependence}, {dependency}] 2: ...
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