Source : Webster's Revised Unabridged Dictionary (1913)

Glycol \Gly"col\, n. [Glycerin + -ol. See {Glycerin}.] (Chem.)
   (a) A thick, colorless liquid, {C2H4(OH)2}, of a sweetish
       taste, produced artificially from certain ethylene
       compounds. It is a diacid alcohol, intermediate between
       ordinary ethyl alcohol and glycerin.