/ Dictionary / Index D diethylacetal: Meaning and Definition of Find definitions for: di•eth•yl•ac•e•tal Pronunciation: (dī-eth"ul-as'i-tal"), [key] — n. Chem. acetal (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dietetic diethylaminoethanol Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language