/ Dictionary / Index L limestone lettuce: Meaning and Definition of Find definitions for: lime'stone let"tuce Pronunciation: [key] a variety of lettuce derived from Bibb lettuce. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. limestone lime sulfur Related Content Daily Word Quiz: menagerie Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language