/ Dictionary / Index L laccolith: Meaning and Definition of Find definitions for: lac•co•lith Pronunciation: (lak'u-lith), [key] — n. Geol. a mass of igneous rock formed from magma that did not find its way to the surface but spread laterally into a lenticular body, forcing overlying strata to bulge upward. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Laccadive, Minicoy, and Amindivi Islands lace Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language