/ Dictionary / Index D Dexamyl: Meaning and Definition of Find definitions for: Dex•a•myl Pronunciation: (dek'su-mil), [key] — Pharm., Trademark. Pharm.,Trademark. a brand name for a mixture of dextroamphetamine and amobarbital that curbs appetite and elevates mood, used in the treatment of obesity or mental depression. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dexamethasone Dexedrine Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language