Webster's Unabridged Dictionary - Letter H

Webster's Unabridged Dictionary - Letter H - Page 31

Heteroscian (n.) One who lives either north or south of the tropics, contrasted with one who lives on the other side of them; -- so called because at noon the shadows always fall in opposite directions (the one northward, the other southward).

Heterosexual (a.) 異性的 Sexually attracted to members of the opposite sex [ant: bisexual, homosexual].

Heterosexual (n.) 異性戀的人 A heterosexual person; someone having a sexual orientation to persons of the opposite sex [syn: heterosexual, heterosexual person, straight person, straight].

Heterosexual (n.) [ C ] ( Informal) Hetero 異性戀者 A person who is sexually attracted to people of the opposite sex.

Compare: Bisexual

Bisexual (a.) 雙性戀的 Sexually attracted to both men and women.

// Bisexual relationships.

Bisexual (n.) [ C ] 雙性戀者 A person who is sexually attracted to both men and women.

// A drop-in centre for gays, lesbians, and bisexuals.

Compare: Homosexual

Homosexual (n.) [C] （尤指男性）同性戀者A person who is sexually attracted to people of the same sex and not to people of the opposite sex.

Notes: Sometimes homosexual refers only to men.

Compare: Lesbian

Lesbian (n.) 女同性戀者 A woman who is sexually attracted to other women.

// Gays and lesbians.

Heterosis (n.) (Rhet.) A figure of speech by which one form of a noun, verb, or pronoun, and the like, is used for another, as in the sentence: "What is life to such as me?" -- Aytoun.

Heterosis (n.) (Genetics) 雜種優勢；混種盛勢 The tendency of a crossbred organism to have qualities superior to those of either parent [syn: heterosis, hybrid vigor].

Heterosomati (n. pl.) (Zool.) An order of fishes, comprising the flounders, halibut, sole, etc., having the body and head asymmetrical, with both eyes on one side. Called also Heterosomata, Heterosomi. Heterosporic

Heterosporic (a.) Alt. of Heterosporous.

Heterosporous (a.) (Bot.) Producing two kinds of spores unlike each other.

Heterostyled (a.) (Bot.) Having styles of two or more distinct forms or lengths. -- Darwin.

Heterostylism (n.) (Bot.) The condition of being heterostyled.

Heterotactous (a.) (Biol.) Relating to, or characterized by, heterotaxy.

Heterotaxy (n.) (Biol.) Variation in arrangement from that existing in a normal form; heterogenous arrangement or structure, as, in botany, the deviation in position of the organs of a plant, from the ordinary or typical arrangement. Heterotopism

Heterotaxy (n.) Any abnormal position of the organs of the body [syn: transposition, heterotaxy].

Heterotopism (n.) Alt. of Heterotopy.

Heterotopy (n.) (Med.) A deviation from the natural position; -- a term applied in the case of organs or growths which are abnormal in situation.

Heterotopy (n.) (Biol.) A deviation from the natural position of parts, supposed to be effected in thousands of years, by the gradual displacement of germ cells.

Heterotricha (n. pl.) (Zool.) A division of ciliated Infusoria, having fine cilia all over the body, and a circle of larger ones around the anterior end. Heterotropal

Heterotropal (a.) Alt. of Heterotropous.

Heterotropous (a.) (Bot.) Having the embryo or ovule oblique or transverse to the funiculus; amphitropous. -- Gray.

Hething (n.) Contempt; scorn. [Obs.] -- Chaucer.

Hetmans (n. pl. ) of Hetman.

Hetman (n.) A Cossack headman or general. The title of chief hetman is now held by the heir to the throne of Russia.

Heugh (n.) A crag; a cliff; a glen with overhanging sides. [Scot. & Prov. Eng.]

Heugh (n.) A shaft in a coal pit; a hollow in a quarry. [Scot.]

Compare: Huke

Huke (n.) An outer garment worn in Europe in the Middle Ages. [Written also heuk and hyke.] [Obs.] -- Bacon.

Heuk (n.) Variant of Huke. [Obs.]

Heulandite (n.) (Min.) A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.

Heulandite (n.) A group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium.

Heuristic (n.) A heuristic method; a specific heuristic procedure.

Heuristic (n.) A theory or approach which serves to promote discovery or learning by encouraging experimentation.

Heuristic (a.) Serving to promote discovery or learning; -- used especially of thories or paradigms which stimulate new ideas for discovering facts in experimental sciences.

Heuristic (a.) Serving to stimulate people to learn and discover on their own, especially by encouraging experimental and trial-and-error methods for solving problems.

Heuristic (a.) Pertaining to or based on trial-and-error and experimental methods of learning and evaluation.

Heuristic (a.) (Computers) Based on the use of an efficient trial-and error method to search a space of possible solutions to a problem, or to find an acceptable approximate solution, when an exact algorithmic method is unavailable or too time-consuming.

Heuristic (a.) Of or relating to or using a general formulation that serves to guide investigation [ant: algorithmic].

Heuristic (n.) A commonsense rule (or set of rules) intended to increase the probability of solving some problem [syn: heuristic, heuristic rule, heuristic program].

Heuristic

Non-algorithmic procedure, () A rule of thumb, simplification, or educated guess that reduces or limits the search for solutions in domains that are difficult and poorly understood. Unlike algorithms, heuristics do not guarantee optimal, or even feasible, solutions and are often used with no theoretical guarantee.

Heuristic

Non-algorithmic procedure, () Approximation algorithm.

(2001-04-12)

Heuristic (n.) （常複數）啟發式教育法 <Programming> A rule of thumb, simplification, or educated guess that reduces or limits the search for solutions in domains that are difficult and poorly understood. Unlike algorithms, heuristics do not guarantee optimal, or even feasible, solutions and are often used with no theoretical guarantee.

Heuristic (n.) Approximation algorithm.

Heuristic (n.) A heuristic method; a specific heuristic procedure.

Heuristic (n.) A theory or approach which serves to promote discovery or learning by encouraging experimentation.

Heuristic (a.) 啟發式的；（電腦程式）探索的；嘗試錯誤的 Serving to promote discovery or learning; -- used especially of thories or paradigms which stimulate new ideas for discovering facts in experimental sciences.

Heuristic (a.) Serving to stimulate people to learn and discover on their own, especially by encouraging experimental and trial-and-error methods for solving problems.

Heuristic (a.) Pertaining to or based on trial-and-error and experimental methods of learning and evaluation.

Heuristic (a.) Of or relating to or using a general formulation that serves to guide investigation [ant: {algorithmic}].

Heuristic (n.) A commonsense rule (or set of rules) intended to increase the probability of solving some problem [syn: {heuristic}, {heuristic rule}, {heuristic program}].

Heuristic

Non-algorithmic procedure, ()

A rule of thumb, simplification, or educated guess that reduces or limits the search for solutions in domains that are difficult and poorly understood. Unlike algorithms, heuristics do not guarantee optimal, or even feasible, solutions and are often used with no theoretical guarantee.

Heuristic

Non-algorithmic procedure, () Approximation algorithm. (2001-04-12)

Heuristic (a.) Serving to discover or find out.

Heuristic (a.) (Specialized) (Of a method of teaching) （教學法）啟發式的，探索式的 Allowing students to learn by discovering things themselves and learning from their own experiences rather than by telling them things.

Heuristic (n.) [ C ] A method of learning or solving problems that allows people to discover things themselves and learn from their own experiences.

// As a heuristic, it is a good test to ask the question: what might I do in this situation?

Heuristics (n.) [ U ] The study and use of heuristic methods.

// Heuristics aren't taught in medical school and are in fact discouraged.

Heved (n.) The head. [Obs.] -- Chaucer.

Hew (n.) Destruction by cutting down. [Obs.]
Of whom he makes such havoc and such hew. -- Spenser.

Hew (n.) Hue; color. [Obs.] -- Chaucer.

Hew (n.) Shape; form. [Obs.] -- Spenser.

Hewed (imp.) of Hew.

Hewed (p. p.) of Hew.

Hewn () of Hew.

Hewing (p. pr. & vb. n.) of Hew.

Hew (v. t.) To cut with an ax; to fell with a sharp instrument; -- often with down, or off. -- Shak.

Hew (v. t.) To form or shape with a sharp instrument; to cut; hence, to form laboriously; -- often with out; as, to hew out a sepulcher.

Look unto the rock whence ye are hewn. -- Is. li. 1.

Rather polishing old works than hewing out new. -- Pope.

Hew (v. t.) To cut in pieces; to chop; to hack.

Hew them to pieces; hack their bones asunder. -- Shak.

Hew (v.) Make or shape as with an axe; "hew out a path in the rock" [syn: hew, hew out].

Hew (v.) Strike with an axe; cut down, strike; "hew an oak."

Hewe (n.) A domestic servant; a retainer. [Obs.] "False homely hewe." -- Chaucer.

Hewer (n.) One who hews.

Hewer (n.) A person who hews.

Hewhole (n.) (Zool.) The European green woodpecker. See Yaffle.

Compare: Yaffle

Yaffle, (n.) (Zool.) The European green woodpecker ({Picus viridis syn. Genius viridis). It is noted for its loud laughlike note. Called also eccle, hewhole, highhoe, laughing bird, popinjay, rain bird, yaffil, yaffler, yaffingale, yappingale, yackel, and woodhack.

Hewn (a.) Felled, cut, or shaped as with an ax; roughly squared; as, a house built of hewn logs.

Hewn (a.) Roughly dressed as with a hammer; as, hewn stone. Hex

Hewn (a.) Cut or shaped with hard blows of a heavy cutting instrument like an ax or chisel; "a house built of hewn logs"; "rough-hewn stone"; "a path hewn through the underbrush" [syn: hewn, hand-hewn].

Hex- () Alt. of Hexa.

Hexa () A prefix or combining form, used to denote six, sixth, etc.; as, hexatomic, hexabasic.

Hexabasic (a.) (Chem.) Having six hydrogen atoms or six radicals capable of being replaced or saturated by bases; -- said of acids; as, mellitic acid is hexabasic.

Hexacapsular (a.) (Bot.) Having six capsules or seed vessels.

Hexachord (n.) (Mus.) A series of six notes, with a semitone between the third and fourth, the other intervals being whole tones.

Hexacid (a.) (Chem.) Having six atoms or radicals capable of being replaced by acids; hexatomic; hexavalent; -- said of bases; as, mannite is a hexacid base.

Hexactinellid (a.) (Zool.) Having six-rayed spicules; belonging to the Hexactinellinae.

Hexactinelline (a.) (Zool.) Belonging to the Hexactinellinae, a group of sponges, having six-rayed siliceous spicules.

Hexactinia (n. pl.) (Zool.) The Anthozoa.

Hexad (n.) (Chem.) An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in sulphuric acid. Also used as an adjective.

Hexad (n.) The cardinal number that is the sum of five and one [syn: six, 6, VI, sixer, sise, Captain Hicks, half a dozen, sextet, sestet, sextuplet, hexad].

Hexadactylous (a.) (Zool.) Having six fingers or toes.

Hexade (n.) A series of six numbers.

Hexadecane (n.) (Chem.) See Hecdecane.

Compare: Hecdecane

Hecdecane (n.) (Chem.) A white, semisolid, spermaceti-like hydrocarbon, C16H34, of the paraffin series, found dissolved as an important ingredient of kerosene, and so called because each molecule has sixteen atoms of carbon; -- called also hexadecane.

Hexagon (n.) (Geom.) A plane figure of six angles.

Regular hexagon, a hexagon in which the angles are all equal, and the sides are also all equal.

Hexagon (n.) A six-sided polygon.

Hexagonal (a.) Having six sides and six angles; six-sided.

Hexagonal system. (Crystal.) See under Crystallization.

Hexagonal (a.) Having six sides or divided into hexagons [syn: hexangular, hexagonal].

Hexagonally (adv.) In an hexagonal manner.

Hexagony (n.) A hexagon. [Obs.] -- Bramhall.

Hexagynia (n. pl.) (Bot.) A Linnaean order of plants having six pistils. Hexagynian

Hexagynian (a.) Alt. of Hexagynous.

Hexagynous (a.) (Bot.) Having six pistils.

Hexahedral (a.) In the form of a hexahedron; having six sides or faces.

Hexahedrons (n. pl. ) of Hexahedron.

Hexahedra (n. pl. ) of Hexahedron.

Hexahedron (n.) (Geom.) A solid body of six sides or faces.

Regular hexahedron, A hexagon having six equal squares for its sides; a cube.

Hexahemeron (n.) A term of six days. -- Good.

Hexahemeron (n.) The history of the six day's work of creation, as contained in the first chapter of Genesis.

Hexamerous (a.) (Bot.) In six parts; in sixes.

Hexameter (n.) (Gr. & Lat. Pros.) A verse of six feet, the first four of which may be either dactyls or spondees, the fifth must regularly be a dactyl, and the sixth always a spondee. In this species of verse are composed the Iliad of Homer and the Aeneid of Virgil. In English hexameters accent takes the place of quantity.

Hexameter (a.) Having six metrical feet, especially dactyls and spondees. -- Holland. Hexametric

Compare: Verse

Verse (n.) A line consisting of a certain number of metrical feet (see Foot, n., 9) disposed according to metrical rules.

Note: Verses are of various kinds, as hexameter, pentameter, tetrameter, etc., according to the number of feet in each. A verse of twelve syllables is called an Alexandrine. Two or more verses form a stanza or strophe.

Verse (n.) Metrical arrangement and language; that which is composed in metrical form; versification; poetry.

Such prompt eloquence Flowed from their lips in prose or numerous verse. -- Milton.

Virtue was taught in verse. -- Prior.

Verse embalms virtue. -- Donne.

Verse (n.) A short division of any composition. Specifically:

Verse (n.) (a) A stanza; a stave; as, a hymn of four verses.

Note: Although this use of verse is common, it is objectionable, because not always distinguishable from the stricter use in the sense of a line.

Verse (n.) (b) (Script.) One of the short divisions of the chapters in the Old and New Testaments.

Note: The author of the division of the Old Testament into verses is not ascertained. The New Testament was divided into verses by Robert Stephens [or Estienne], a French printer. This arrangement appeared for the first time in an edition printed at Geneva, in 1551.

Verse (n.) (c) (Mus.) A portion of an anthem to be performed by a single voice to each part.

Verse (n.) A piece of poetry. "This verse be thine." -- Pope.

Blank verse, Poetry in which the lines do not end in rhymes.

Heroic verse. See under Heroic.

Hexameter (n.) A verse line having six metrical feet.

Hexametric (a.) Alt. of Hexametrical.

Hexametrical (a.) Consisting of six metrical feet.

Hexametrist (n.) One who writes in hexameters. "The Christian hexametrists." -- Milman.

Hexandria (n. pl.) (Bot.) A Linnaean class of plants having six stamens. Hexandrian

Hexandrian (a.) Alt. of Hex-androus.

Hex-androus (a.) (Bot.) Having six stamens.

Hexane (n.) (Chem.) Any one of five hydrocarbons, C6H14, of the paraffin series. They are colorless, volatile liquids, and are so called because the molecule has six carbon atoms.

Hexane (n.) A colorless flammable liquid alkane derived from petroleum and used as a solvent.

Hexangular (a.) Having six angles or corners.

Hexangular (a.) Having six sides or divided into hexagons [syn: hexangular, hexagonal].

Hexapetalous (a.) (Bot.) Having six petals.

Hexaphyllous (a.) (Bot.) Having six leaves or leaflets.

Hexapla (n.) A collection of the Holy Scriptures in six languages or six versions in parallel columns; particularly, the edition of the Old Testament published by Origen, in the 3d century.

Hexapod (a.) Having six feet.

Hexapod (n.) (Zool.) An animal having six feet; one of the Hexapoda.

Hexapod (n.) An animal having six feet.

Hexapoda (n. pl.) (Zool.) The true, or six-legged, insects; insects other than myriapods and arachnids.

Note: The Hexapoda have the head, thorax, and abdomen differentiated, and are mostly winged. They have three pairs of mouth organs, viz., mandibles, maxill[ae], and the second maxill[ae] or labial palpi; three pairs of thoracic legs; and abdominal legs, which are present only in some of the lowest forms, and in the larval state of some of the higher ones. Many (the Metabola) undergo a complete metamorphosis, having larv[ae] (known as maggots, grubs, caterpillars) very unlike the adult, and pass through a quiescent pupa state in which no food is taken; others (the Hemimetabola) have larv[ae] much like the adult, expert in lacking wings, and an active pupa, in which rudimentary wings appear. See Insecta. The Hexapoda are divided into several orders.

Hexapoda (n.) Insects; about five-sixths of all known animal species [syn: Insecta, class Insecta, Hexapoda, class Hexapoda].

Hexapodous (a.) (Zool.) Having six feet; belonging to the Hexapoda.

Hexapterous (a.) (Bot.) Having six processes. -- Gray. Hexastich

Hexastich (n.) Alt. of Hexastichon.

Hexastichon (n.) 【詩】六行詩 A poem consisting of six verses or lines.

Hexastyle (a.) (Arch.) 【建】六柱式的 Having six columns in front; -- said of a portico or temple.

Hexastyle (n.) (Arch.) A hexastyle portico or temple.

Hexateuch (n.) （舊約聖經之）首六卷 The first six books of the Old Testament.

Hexatomic (a.) (Chem.) Having six atoms in the molecule. [R.]

Hexatomic (a.) (Chem.) Having six replaceable radicals.

Hexavalent (a.) (Chem.) Having a valence of six; -- said of hexads.

Hexdecyl (n.) (Chem.) The essential radical, C16H33, of hecdecane.

Hexdecylic (a.) (Chem.) Pertaining to, or derived from, hexdecyl or hecdecane; as, hexdecylic alcohol.

Hexeikosane (n.) (Chem.) A hydrocarbon, C26H54, resembling paraffine; -- so called because each molecule has twenty-six atoms of carbon. [Written also hexacosane.]

Compare: Hexylene

Hexylene (n.) (Chem.) A colorless, liquid hydrocarbon, C6H12, of the ethylene series, produced artificially, and found as a natural product of distillation of certain coals; also, any one several isomers of hexylene proper. Called also hexene.

Hexene (n.) (Chem.) Same as Hexylene.

Hexicology (n.) The science which treats of the complex relations of living creatures to other organisms, and to their surrounding conditions generally. -- St. George Mivart.

Hexine (n.) (Chem.) A hydrocarbon, C6H10, of the acetylene series, obtained artificially as a colorless, volatile, pungent liquid; -- called also hexoylene.

Hexoctahedron (n.) (Geom.) A solid having forty-eight equal triangular faces.

Hexoic (a.) (Chem.) Pertaining to, or derived from, hexane; as, hexoic acid.

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