/ Dictionary / Index L leucocyte: Meaning and Definition of Find definitions for: leu•co•cyte Pronunciation: (l'ku-sīt"), [key] — n. Immunol. leukocyte. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: leucocyte (Thesaurus) leucocratic leucocytosis Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language