Hex- (?), Hex"a (#). [Gr. "e`x six. See Six.] A prefix or combining
form, used to denote six, sixth, etc.; as, hexatomic, hexabasic.
Hex`a*ba"sic (?), 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.
Hex`a*cap"su*lar (?), a. [Hexa- + capsular.] (Bot.) Having six capsules
or seed vessels.
Hex"a*chord (?), n. [Hexa- + Gr. &?; 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.
Hex`ac"id (?), 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.
Hex*ac`ti*nel"lid (?), a. (Zoˆl.) Having six-rayed spicules; belonging
to the HexactinellinÊ.
Hex*ac`ti*nel"line (?), a. [From NL. HexactinellinÊ, fr. Gr. "e`x six +
a dim. of &?;, &?;, a ray.] (Zoˆl.) Belonging to the HexactinellinÊ, a
group of sponges, having six-rayed siliceous spicules.
||Hex`ac*tin"i*a (?), n. pl. [NL. See Hex-, and Actinia.] (Zoˆl.) The
||Anthozoa.
Hex"ad (?), n. [L. hexas, hexadis, the number six, Gr. &?;, &?;, 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.
Hex`a*dac"tyl*ous (?), a. [Gr. &?;; "e`x six + &?; finger: cf. F.
hexadactyle.] (Zoˆl.) Having six fingers or toes.
Hex"ade (?), n. [See Hexad.] A series of six numbers.
Hex"a*dec`ane (?), n. (Chem.) See Hecdecane.
Hex"a*gon (?), n. [L. hexagonum, Gr. &?; six-cornered; "e`x six (akin
to E. six) + &?; angle.] (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.
Hex*ag"o*nal (?), a. [Cf. F. hexagonal.] Having six sides and six
angles; six- sided.
Hexagonal system. (Crystal.) See under Crystallization.
Hex*ag"o*nal*ly, adv. In an hexagonal manner.
Hex*ag"o*ny (?), n. A hexagon. [Obs.] Bramhall.
||Hex`a*gyn"i*a (?), n. pl. [NL., fr. Gr. "e`x six + gynh^ a woman,
||female: cf. F. hexagynie.] (Bot.) A LinnÊan order of plants having
||six pistils.
Hex`a*gyn"i*an (?), Hex*ag"y*nous (&?;), a. [Cf. F. hexagyne.] (Bot.)
Having six pistils.
Hex`a*he"dral (?), a. In the form of a hexahedron; having six sides or
faces.
Hex`a*he"dron (?), n.; pl. E. Hexahedrons (#), L. Hexahedra (#). [Hexa-
+ Gr. &?; seat, base, fr. &?; to sit: cf. F. hexaËdre.] (Geom.) A solid
body of six sides or faces.
Regular hexahedron, a hexagon having six equal squares for its sides; a
cube.
Hex`a*hem"er*on (?), n. [NL., fr. Gr. "e`x six + &?; day; cf. L.
hexaÎmeron, Gr. &?;.]