Breadcrumb Home > Dictionary > Index L Leucas: Meaning and Definition of Find definitions for: Leu•cas Pronunciation: (l'kus), [key] — n. Levkas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. leucaena leucemia ✖ Related Content Daily Word Quiz: centrifugal Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language