Hexagonal Hex·ag"o·nal adjective [ Confer French hexagonal .] Having six sides and six angles; six- sided.

Hexagonal system . (Crystal.) See under Crystallization .

Hexagonally Hex·ag"o·nal·ly adverb In an hexagonal manner.

Hexagony Hex·ag"o·ny noun A hexagon. [ Obsolete] Bramhall.

Hexagram Hex"a·gram noun [ Hexa- + - gram .] A figure of six lines ; specif.: (a) A figure composed of two equal triangles intersecting so that each side of one triangle is parallel to a side of the other, and the six points coincide with those of a hexagon. (b) In Chinese literature, one of the sixty-four figures formed of six parallel lines (continuous or broken), forming the basis of the Yih King, or "Book of Changes." S. W. Williams.

Hexagynia Hex`a·gyn"i·a noun plural [ New Latin , from Greek "e`x six + gynh^ a woman, female: confer French hexagynie .] (Botany) A Linnæan order of plants having six pistils.

Hexagynian, Hexagynous Hex`a·gyn"i·an, Hex·ag"y·nous adjective [ Confer French hexagyne .] (Botany) Having six pistils.

Hexahedral Hex`a·he"dral adjective In the form of a hexahedron; having six sides or faces.

Hexahedron Hex`a·he"dron noun ; plural English Hexahedrons , Latin Hexahedra . [ Hexa- + Greek ... seat, base, from ... to sit: confer French hexaèdre .] (Geom.) A solid body of six sides or faces.

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

Hexahemeron Hex`a·hem"er·on noun [ New Latin , from Greek "e`x six + ... day; confer Latin hexaëmeron , Greek ....]

1. A term of six days. Good.

2. The history of the six day's work of creation, as contained in the first chapter of Genesis.

Hexamerous Hex·am"er·ous adjective [ Hexa- + Greek ... part.] (Botany) In six parts; in sixes.

Hexameter Hex·am"e·ter noun [ Latin , from Greek ... of six meters; (sc. ...) hexameter verse; "e`x six + ... measure: confer French hexamètre . See Six , and Meter .] (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 Æneid of Virgil. In English hexameters accent takes the place of quantity.

Leaped like the

Hexameter Hex·am"e·ter adjective Having six metrical feet, especially dactyls and spondees. Holland.

Hexametric, Hexametrical Hex`a·met"ric, Hex`a·met"ric·al adjective Consisting of six metrical feet.

Hexametrist Hex·am"e·trist noun One who writes in hexameters. "The Christian hexametrists ." Milman.

Hexandria Hex·an"dri·a 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 Hex·an"dri·an, Hex-an"drous adjective [ Confer French hexandre .] (Botany) Having six stamens.

Hexane Hex"ane 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 Hex·an"gu·lar adjective [ Hex- + angular . Confer Sexangular .] Having six angles or corners.

Hexapetalous Hex`a·pet"al·ous adjective [ Hexa- + petal : confer French hexapétale .] (Botany) Having six petals.

Hexaphyllous Hex·aph"yl·lous adjective [ Hexa- + Greek ... a leaf: confer French hexaphylle .] (Botany) Having six leaves or leaflets.

Hexapla Hex"a·pla 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 Hex"a·pod 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 Hex·ap"o·da 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 Hex·ap"o·dous adjective (Zoology) Having six feet; belonging to the Hexapoda.

Hexapterous Hex·ap"ter·ous adjective [ Hexa- + Greek ... wing.] (Botany) Having six processes. Gray.

Hexastich Hex"a·stich 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 Hex"a·style 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 Hex"a·teuch` noun [ Hexa- + ... a tool, a book.] The first six books of the Old Testament.

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

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

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

Hexdecylic Hex`de·cyl"ic adjective (Chemistry) Pertaining to, or derived from, hexdecyl or hecdecane; as, hexdecylic alcohol.

Hexeikosane Hex·ei"ko·sane 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 Hex"ene noun [ Greek "e`x six.] (Chemistry) Same as Hexylene .

Hexicology Hex`i·col"ogy 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 Hex"ine 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 Hex·oc`ta·he"dron noun [ Hex- + octahedron .] (Geom.) A solid having forty-eight equal triangular faces.

Hexoic Hex·o"ic adjective (Chemistry) Pertaining to, or derived from, hexane; as, hexoic acid.

Hexone Hex"one 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 Hex"ose 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 Hex"yl 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 Hex"yl·ene 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 Hex·yl"ic adjective (chem.) Pertaining to, or derived from, hexyl or hexane; as, hexylic alcohol.

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

Hey 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 Hey"day` 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 Hey"day` 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 Hey"de·guy noun [ Perh. from heyday + guise .] A kind of country-dance or round. [ Obsolete] Spenser.

Heyh, Heygh Heyh, Heygh adjective High. [ Obsolete] Chaucer.

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

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