/ Dictionary / Index L ligule: Meaning and Definition of Find definitions for: lig•ule Pronunciation: (lig'yl), [key] — n. Bot. a thin, membranous outgrowth from the base of the blade of most grasses. a strap-shaped corolla, as in the ray flowers of the head of certain composite plants. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ligule (Thesaurus) ligulate ligure Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language