a. [ Pref. di- + hexagonal. ] (a) Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base. (b) Having twelve similar faces; as, a dihexagonal prism. [ 1913 Webster ]

/mhw>. [ Gr. "e`x six. See Six.] A prefix or combining form, used to denote six, sixth, etc.; as, hexatomic, hexabasic. [1913 Webster]

a. [ Hexa- + basic. ] (Chem.) Having six hydrogen atoms or six radicals capable of being replaced or saturated by bases; -- said of acids; as, mellitic acid is hexabasic. [ 1913 Webster ]

a. [ Hexa- + capsular. ] (Bot.) Having six capsules or seed vessels. [ 1913 Webster ]

n. [ Hexa- + Gr. &unr_; string, chord: cf. F. hexacorde. ] (Mus.) A series of six notes, with a semitone between the third and fourth, the other intervals being whole tones. [ 1913 Webster ]

a. [ Hex- + acid. ] (Chem.) Having six atoms or radicals capable of being replaced by acids; hexatomic; hexavalent; -- said of bases; as, mannite is a hexacid base. [ 1913 Webster ]

a. (Zool.) Having six-rayed spicules; belonging to the Hexactinellinæ. [ 1913 Webster ]

a. [ From NL. Hexactinellinæ, fr. Gr. "e`x six + a dim. of &unr_;, &unr_;, a ray.] (Zool.) Belonging to the Hexactinellinæ, a group of sponges, having six-rayed siliceous spicules. [1913 Webster]

‖n. pl. [ NL. See Hex-, and Actinia. ] (Zool.) The Anthozoa. [ 1913 Webster ]

n. [ L. hexas, hexadis, the number six, Gr. &unr_;, &unr_;, fr. "e`x six.] (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. [1913 Webster]

a. [ Gr. &unr_;; "e`x six + &unr_; finger: cf. F. hexadactyle.] (Zool.) Having six fingers or toes. [1913 Webster]

n. [ See Hexad. ] A series of six numbers. [ 1913 Webster ]

n. (Chem.) See Hecdecane. [ 1913 Webster ]

n. [ L. hexagonum, Gr. &unr_; six-cornered; "e`x six (akin to E. six) + &unr_; angle.] (Geom.) A plane figure of six angles. [1913 Webster]

Regular hexagon, a hexagon in which the angles are all equal, and the sides are also all equal. [1913 Webster]

a. [ Cf. F. hexagonal. ] Having six sides and six angles; six-sided. [ 1913 Webster ]

Hexagonal system. (Crystal.) See under Crystallization. [ 1913 Webster ]

adv. In an hexagonal manner. [ 1913 Webster ]

n. A hexagon. [ Obs. ] Bramhall. [ 1913 Webster ]

n. [ 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 I Ching (Yih King), or “Book of Changes.” S. W. Williams. [ Webster 1913 Suppl. ]

‖n. pl. [ NL., fr. Gr. "e`x six + gynh^ a woman, female: cf. F. hexagynie.] (Bot.) A Linnæan order of plants having six pistils.

/mhw>, a. [ Cf. F. hexagyne. ] (Bot.) Having six pistils. [ 1913 Webster ]

a. In the form of a hexahedron; having six sides or faces. [ 1913 Webster ]

n.; pl. E. Hexahedrons L. Hexahedra [ Hexa- + Gr. &unr_; seat, base, fr. &unr_; to sit: cf. F. hexaèdre. ] (Geom.) A solid body of six sides or faces. [ 1913 Webster ]

Regular hexahedron, a hexagon having six equal squares for its sides; a cube. [ 1913 Webster ]

n. [ NL., fr. Gr. "e`x six + &unr_; day; cf. L. hexaëmeron, Gr. &unr_;.] [1913 Webster]

1. A term of six days. Good. [1913 Webster]

2. The history of the six day's work of creation, as contained in the first chapter of Genesis. [1913 Webster]

a. [ Hexa- + Gr.&unr_; part. ] (Bot.) In six parts; in sixes. [ 1913 Webster ]

n. [ L., fr. Gr. &unr_; of six meters; (sc. &unr_;) hexameter verse; "e`x six + &unr_; measure: cf. F. 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 Aeneid of Virgil. In English hexameters accent takes the place of quantity. [1913 Webster]

Leaped like the | roe when he | hears in the | woodland the | voice of the | huntsman. Longfellow. [1913 Webster]

Strongly it | bears us a- | long on | swelling and | limitless | billows,
Nothing be- | fore and | nothing be- | hind but the | sky and the | ocean. Coleridge. [1913 Webster]

a. Having six metrical feet, especially dactyls and spondees. Holland.

{ } a. Consisting of six metrical feet. [ 1913 Webster ]

n. One who writes in hexameters. “The Christian hexametrists.” Milman. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. "e`x six + &unr_;, &unr_;, a man, male: cf. F. hexandrie.] (Bot.) A Linnæan class of plants having six stamens.

{ } a. [ Cf. F. hexandre. ] (Bot.) Having six stamens. [ 1913 Webster ]

n. [ Gr. "e`x six.] (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. [1913 Webster]

a. [ Hex- + angular. Cf. Sexangular. ] Having six angles or corners. [ 1913 Webster ]

a. [ Hexa- + petal: cf. F. hexapétale. ] (Bot.) Having six petals. [ 1913 Webster ]

a. [ Hexa- + Gr. &unr_; a leaf: cf. F. hexaphylle. ] (Bot.) Having six leaves or leaflets. [ 1913 Webster ]

‖n. Etym. pl., but syntactically sing. [ NL., fr. Gr. &unr_;, fr. &unr_;, contr. &unr_;, 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. [ 1913 Webster ]

a. [ Gr. &unr_;, &unr_;, sixfooted; "e`x six + &unr_;, &unr_;, foot: cf. F. hexapode.] Having six feet. -- n. (Zool.) An animal having six feet; one of the Hexapoda. [1913 Webster]

‖n. pl. [ NL., fr. Gr. "e`x six + -poda.] (Zool.) The true, or six-legged, insects; insects other than myriapods and arachnids. [1913 Webster]

☞ 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. [1913 Webster]

a. (Zool.) Having six feet; belonging to the Hexapoda. [ 1913 Webster ]

a. [ Hexa- + Gr. &unr_; wing. ] (Bot.) Having six processes. Gray.

{ ‖ } n. [ L. hexastichus of six rows, lines, or verses, Gr. &unr_;; "e`x six + sti`chos row, line, verse.] A poem consisting of six verses or lines. [1913 Webster]

a. [ Gr. &unr_; with six columns; "e`x six + column: cf. F. hexastyle.] (Arch.) Having six columns in front; -- said of a portico or temple. -- n. A hexastyle portico or temple. [1913 Webster]

n. [ Hexa- + &unr_; a tool, a book. ] The first six books of the Old Testament. [ 1913 Webster ]

a. [ Hex- + atomic. ] (Chem.) (a) Having six atoms in the molecule. [ R. ] (b) Having six replaceable radicals. [ 1913 Webster ]

a. [ Hexa- + L. valens, -entis, p. pr. See Valence. ] (Chem.) Having a valence of six; -- said of hexads. [ 1913 Webster ]

a. (Crystallog.) Pertaining to a tetrahexahedron. [ 1913 Webster ]

n. [ Tetra- + hexahedron. ] (Crystallog.) A solid in the isometric system, bounded by twenty-four equal triangular faces, four corresponding to each face of the cube. [ 1913 Webster ]

n. [ Gr. &unr_; four times + E. hexahedron. ] (Crystallog.) A tetrahexahedron. [ 1913 Webster ]