Dictionary
ke•tene
Pronunciation: (kē'tēn), [key]—
n. Chem.
a colorless, poisonous gas, C
2H
2O, irritating to the lungs, prepared from acetone or acetic acid by pyrolysis: used chiefly in the manufacture of certain commercial chemicals, as acetic anhydride and aspirin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.