/ Dictionary / Index A arecoline: Meaning and Definition of Find definitions for: a•re•co•line Pronunciation: (u-rē'ku-lēn", -lin, u-rek'u-, ar'i-ku-), [key] — n. a toxic alkaloid obtained from the seeds of the areca, used chiefly in veterinary medicine as an agent for killing and expelling intestinal worms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Arecibo Observatory areligious Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language