11-letter words containing r, o, s, h, a
- horn clause — (logic) A set of atomic literals with at most one positive literal. Usually written L <- L1, ..., Ln or <- L1, ..., Ln where n>=0, "<-" means "is implied by" and comma stands for conjuction ("AND"). If L is false the clause is regarded as a goal. Horn clauses can express a subset of statements of first order logic. The name "Horn Clause" comes from the logician Alfred Horn, who first pointed out the significance of such clauses in 1951, in the article "On sentences which are true of direct unions of algebras", Journal of Symbolic Logic, 16, 14-21. A definite clause is a Horn clause that has exactly one positive literal.
- horn-spread — (of a horned creature) the distance between the outermost tips of the horns.
- horrisonant — Having an unpleasant sound.
- horse brass — a brass ornament, originally intended for the harness of a horse.
- horse guard — a black and yellow sand wasp, Bembix carolina, of the southern U.S., preying on flies that gather around horses and cattle.
- horse laugh — a loud, coarse laugh, especially of derision.
- horse opera — a television or radio program or motion picture about the Wild West, often presented serially and usually dealing with adventures of cowboys, gunmen, gold prospectors, etc. Compare Western (def 8).
- horse's ass — a stupid or foolish person.
- horse-drawn — A horse-drawn carriage, cart, or other vehicle is one that is pulled by one or more horses.
- horse-faced — having a large face with lantern jaws and large teeth.
- horse-trade — to bargain or trade shrewdly.
- horselaughs — Plural form of horselaugh.
- horseplayer — a habitual bettor on horse races.
- horseracing — Alternative form of horse racing.
- horseradish — a cultivated plant, Armoracia rusticana, of the mustard family, having small, white flowers.
- horsetrader — (literally) A person who buys and sells horses, especially one who makes such transactions in a clever or skillful manner.
- hospitaller — a member of the religious and military order (Knights Hospitalers or Knights of St. John of Jerusalem) originating about the time of the first Crusade (1096–99) and taking its name from a hospital at Jerusalem.
- hourglasses — Plural form of hourglass.
- house brand — a brand name used by a retailer for a product or product line made specifically for or by the retailer.
- house organ — a periodical issued by a business or other establishment for its employees, customers, and other interested readers, presenting news about the firm, its products, and its personnel.
- house party — the guests at such an affair or party: The house party goes sailing today.
- house-craft — skill in domestic management
- house-train — to housebreak.
- houseboater — One who lives in a houseboat.
- housebreaks — Third-person singular simple present indicative form of housebreak.
- housefather — a man responsible for a group of young people, as students, living in a dormitory, hostel, etc.
- houselander — Caryll [kar-uh l] /ˈkær əl/ (Show IPA), 1901–54, English writer on Roman Catholicism.
- housemaster — a man who is in charge of a house or a dormitory in a private school for boys.
- houseparent — one of a married couple responsible for a group of young people, as students, living in a dormitory, hostel, etc., sometimes acting solely as an advisor, but often serving as host or hostess, chaperon, housekeeper, etc.
- hoverboards — Plural form of hoverboard.
- hovercrafts — (nonstandard) Plural form of hovercraft.
- howard moss — Howard, 1922–1987, U.S. poet, editor, and playwright.
- hydragogues — Plural form of hydragogue.
- hydrocorals — any colonial marine animal of the hydrozoan order Stylasterina having a calcareous skeleton resembling that of the true corals.
- hydrogenase — an enzyme in certain microorganisms that speeds up the reversible oxidation of hydrogen
- hydrolysate — any compound formed by hydrolysis.
- hydromedusa — the medusa form of a hydrozoan.
- hydroplanes — Plural form of hydroplane.
- hydrostatic — of or relating to hydrostatics.
- hydroxylase — any enzyme that catalyzes the introduction of a hydroxyl group into a substance.
- hygrographs — Plural form of hygrograph.
- hyoplastral — of or relating to hyoplastra
- hypersomnia — a tendency to sleep excessively.
- hypogastric — of, relating to, or situated in the hypogastrium.
- hypsography — a branch of geography that deals with the measurement and mapping of the topography of the earth above sea level.
- ichthyosaur — any fishlike marine reptile of the extinct order Ichthyosauria, ranging from 4 to 40 feet (1.2 to 12 meters) in length and having a round, tapering body, a large head, four paddlelike flippers, and a vertical caudal fin.
- icosahedral — Of, relating to, or having the shape of an icosahedron.
- icosahedron — a solid figure having 20 faces.
- intraschool — Within a single school.
- ioshkar-ola — autonomous republic in the Russian Federation in Europe. 8994 sq. mi. (23,294 sq. km). Capital: Ioshkar-Ola.