/ Dictionary / Index D diethylpropion: Meaning and Definition of Find definitions for: di•eth•yl•pro•pi•on Pronunciation: (dī-eth"ul-prō'pē-un), [key] — n. Pharm. a sympathomimetic substance, CHNO&multiplydot;HCl, used as an appetite suppressor and a short-term adjunct in the management of certain kinds of obesity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diethyl oxide diethylstilbestrol Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language