Webster's Dictionary, 1913

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Hexandria noun plural [ New Latin , from Greek "e`x six + ..., ..., a man, male: confer French hexandrie .] (Botany) A Linnæan class of plants having six stamens.

Hexandrian, Hex-androus adjective [ Confer French hexandre .] (Botany) Having six stamens.

Hexane noun [ Greek "e`x six.] (Chemistry) Any one of five hydrocarbons, C 6 H 14 , of the paraffin series. They are colorless, volatile liquids, and are so called because the molecule has six carbon atoms.

Hexangular adjective [ Hex- + angular . Confer Sexangular .] Having six angles or corners.

Hexapetalous adjective [ Hexa- + petal : confer French hexapétale .] (Botany) Having six petals.

Hexaphyllous adjective [ Hexa- + Greek ... a leaf: confer French hexaphylle .] (Botany) Having six leaves or leaflets.

Hexapla noun Etym. plural , but syntactically sing. [ New Latin , from Greek ..., from ..., contr. ..., sixfold.] 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 adjective [ Greek ..., ..., sixfooted; "e`x six + ..., ..., foot: confer French hexapode .] Having six feet. -- noun (Zoology) An animal having six feet; one of the Hexapoda.

Hexapoda noun plural [ New Latin , from Greek "e`x six + -poda .] (Zoology) The true, or six-legged, insects; insects other than myriapods and arachnids.

» The Hexapoda have the head, thorax, and abdomen differentiated, and are mostly winged. They have three pairs of mouth organs, viz., mandibles, maxillæ, and the second maxillæ 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 larvæ (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 larvæ 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.

Hexapodous adjective (Zoology) Having six feet; belonging to the Hexapoda.

Hexapterous adjective [ Hexa- + Greek ... wing.] (Botany) Having six processes. Gray.

Hexastich Hex*as"ti*chon noun [ Latin hexastichus of six rows, lines, or verses, Greek ...; "e`x six + sti`chos row, line, verse.] A poem consisting of six verses or lines.

Hexastyle adjective [ Greek ... with six columns; "e`x six + column: confer French hexastyle .] (Architecture) Having six columns in front; -- said of a portico or temple. -- noun A hexastyle portico or temple.

Hexateuch noun [ Hexa- + ... a tool, a book.] The first six books of the Old Testament.

Hexatomic adjective [ Hex- + atomic .] (Chemistry) (a) Having six atoms in the molecule. [ R.] (b) Having six replaceable radicals.

Hexavalent adjective [ Hexa- + Latin valens , -entis , present participle See Valence .] (Chemistry) Having a valence of six; -- said of hexads.

Hexdecyl noun [ Hex- + decyl .] (Chemistry) The essential radical, C 16 H 33 , of hecdecane.

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

Hexeikosane noun [ Hex- + eikosane .] (chem.) A hydrocarbon, C 26 H 54 , resembling paraffine; -- so called because each molecule has twenty-six atoms of carbon. [ Written also hexacosane .]

Hexene noun [ Greek "e`x six.] (Chemistry) Same as Hexylene .

Hexicology noun [ Greek ... state or habit + -logy .] The science which treats of the complex relations of living creatures to other organisms, and to their surrounding conditions generally. St. George Mivart.

Hexine noun [ Greek "e`x six.] (Chemistry) A hydrocarbon, C 6 H 10 , of the acetylene series, obtained artificially as a colorless, volatile, pungent liquid; -- called also hexoylene .

Hexoctahedron noun [ Hex- + octahedron .] (Geom.) A solid having forty-eight equal triangular faces.

Hexoic adjective (Chemistry) Pertaining to, or derived from, hexane; as, hexoic acid.

Hexone noun [ Hex- + - one .] (Chemistry) A liquid hydrocarbon, C 6 H 8 , of the valylene series, obtained from distillation products of certain fats and gums.

Hexose noun [ Hexa- + - ose .] (Chemistry) Any member of a group of sugars containing six carbon atoms in the molecule. Some are widely distributed in nature, esp. in ripe fruits.

Hexyl noun [ Hex- + - yl .] (chem.) A compound radical, C 6 H 13 , regarded as the essential residue of hexane , and a related series of compounds.

Hexylene noun [ Hex- + - yl + ethl ene .] (Chemistry) A colorless, liquid hydrocarbon, C 6 H 12 , 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 .

Hexylic adjective (chem.) Pertaining to, or derived from, hexyl or hexane; as, hexylic alcohol.

Hey adjective [ See High .] High. [ Obsolete] Chaucer.

Hey interj. [ Middle English hei ; confer D. & German hei .]
1. An exclamation of joy, surprise, or encouragement. Shak.

2. A cry to set dogs on. Shak.

Heyday interj. [ Confer German heida , or hei da , Dutch hei daar . Confer Hey , and There .] An expression of frolic and exultation, and sometimes of wonder. B. Jonson.

Heyday noun [ Prob. for. high day . See High , and Day .] The time of triumph and exultation; hence, joy, high spirits, frolicsomeness; wildness.

The heyday in the blood is tame.
Shak.

In the heyday of their victories.
J. H. Newman.

Heydeguy noun [ Perh. from heyday + guise .] A kind of country-dance or round. [ Obsolete] Spenser.

Heyh, Heygh adjective High. [ Obsolete] Chaucer.

Heyne noun [ Anglo-Saxon heán low, mean.] A wretch; a rascal. [ Obsolete] Chaucer.

Heyten adverb [ Icelandic h......an .] Hence. [ Obsolete] Chaucer.

Hiation noun [ See Hiatus .] Act of gaping. [ Obsolete] Sir T. Browne.

Hiatus noun ; plural Latin Hiatus , English Hiatuses . [ Latin , from hiare , hiatum , to gape; akin to English yawn . See Yawn .]
1. An opening; an aperture; a gap; a chasm; esp., a defect in a manuscript, where some part is lost or effaced; a space where something is wanting; a break.

2. (Gram.) The concurrence of two vowels in two successive words or syllables. Pope.

Hibernacle noun [ Latin hibernaculum a winter residence, plural hibernacula winter quarters: confer French hibernacle . See Hibernate .] That which serves for protection or shelter in winter; winter quarters; as, the hibernacle of an animal or a plant. Martyn.

Hibernaculum noun [ See Hibernacle .]
1. (Botany) A winter bud, in which the rudimentary foliage or flower, as of most trees and shrubs in the temperate zone, is protected by closely overlapping scales.

2. (Zoology) A little case in which certain insects pass the winter.

3. Winter home or abiding place. J. Burroughs.

Hibernal adjective [ Latin hibernalis , from the root of hiems winter; akin to Greek ... snow, Sanskrit hima cold, winter, snow: confer French hibernal .] Belonging or relating to winter; wintry; winterish. Sir T. Browne.

Hibernate intransitive verb [ imperfect & past participle Hibernated ; present participle & verbal noun Hibernating .] [ Latin hibernare , hibernatum , from hibernus wintry. See Hibernal .] To winter; to pass the season of winter in close quarters, in a torpid or lethargic state, as certain mammals, reptiles, and insects.

Inclination would lead me to hibernate , during half the year, in this uncomfortable climate of Great Britain.
Southey.

Hibernation noun [ Confer French hibernation .] The act or state of hibernating. Evelyn.

Hibernian adjective [ Latin Hibernia , Ireland.] Of or pertaining to Hibernia, now Ireland; Irish. -- noun A native or an inhabitant of Ireland.

Hibernicism, Hibernianism noun An idiom or mode of speech peculiar to the Irish. Todd.

Hiberno-Celtic noun The native language of the Irish; that branch of the Celtic languages spoken by the natives of Ireland. Also adj .

Hibiscus noun [ Latin , marsh mallow; confer Greek ....] (Botany) A genus of plants (herbs, shrubs, or trees), some species of which have large, showy flowers. Some species are cultivated in India for their fiber, which is used as a substitute for hemp. See Althea , Hollyhock , and Manoe .

Hiccius doctius [ Corrupted from Latin hic est doctus this is a learned man.] A juggler. [ Cant] Hudibras.