Breadcrumb Home > Dictionary > Index L leucocratic: Meaning and Definition of Find definitions for: leu•co•crat•ic Pronunciation: (l"ku-krat'ik), [key] — adj. Geol. (of a rock) composed mainly of light-colored minerals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leucoblast leucocyte ✖ Related Content Daily Word Quiz: hortatory Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language