/ Dictionary / Index A Adrenalin: Meaning and Definition of Find definitions for: A•dren•al•in Pronunciation: (u-dren'l-in), [key] — Pharm., Trademark. Pharm.,Trademark. epinephrine (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: adrenalin (Thesaurus) adrenal gland adrenaline Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language