/ Dictionary / Index D dimethylketol: Meaning and Definition of Find definitions for: di•meth•yl•ke•tol Pronunciation: (dī-meth"ul-kē'tôl, -tol), [key] — n. Chem. acetoin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dimethylhydrazine dimethylketone Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language