Breadcrumb Home > Dictionary > Index A aculeus: Meaning and Definition of Find definitions for: a•cu•le•us Pronunciation: (u-ky'lē-us) [key] — pl. -le•i the modified ovipositor or sting of certain hymenopterous insects. prickle (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: aculeus (Thesaurus) aculeate acumen TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: miasma Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language