/ Dictionary / Index L longicorn: Meaning and Definition of Find definitions for: lon•gi•corn Pronunciation: (lon'ji-kôrn"), [key] — Entomol. Entomol. —adj. having long antennae. belonging or pertaining to the Cerambycidae, comprising the long-horned beetles. —n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: longicorn (Thesaurus) longicaudal longies Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language