Defn: 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.
HEXADACTYLOUS
Hex`a*dac"tyl*ous, a. Etym: [Gr. hexadactyle.] (Zoöl.)
Defn: Having six fingers or toes.
HEXADE
Hex"ade, n. Etym: [See Hexad.]
Defn: A series of six numbers.
HEXADECANE
Hex"a*dec`ane, n. (Chem.)
Defn: See Hecdecane.
HEXAGON
Hex"a*gon, n. Etym: [L. hexagonum, Gr. six) + (Geom.)
Defn: A plane figure of six angles. Regular hexagon, a hexagon in which the angles are all equal, and the sides are also all equal.
HEXAGONAL
Hex*ag"o*nal, a. Etym: [Cf. F. hexagonal.]