Defn: 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, n. Etym: [Gr. "e`x six.] (Chem.)

Defn: A hydrocarbon, C6H10, of the acetylene series, obtained artificially as a colorless, volatile, pungent liquid; — called also hexoylene.

HEXOCTAHEDRON
Hex*oc`ta*he"dron, n. Etym: [Hex- + octahedron.] (Geom.)

Defn: A solid having forty-eight equal triangular faces.

HEXOIC
Hex*o"ic, a. (Chem.)

Defn: Pertaining to, or derived from, hexane; as, hexoic acid.

HEXONE
Hex"one, n. Etym: [Hex- + -one.] (Chem.)

Defn: A liquid hydrocarbon, C6H8, of the valylene series, obtained from distillation products of certain fats and gums.

HEXOSE
Hex"ose, n. [Hexa- + -ose.] (Chem.)