/ Dictionary / Index M monocyte: Meaning and Definition of Find definitions for: mon•o•cyte Pronunciation: (mon'u-sīt"), [key] — n. Cell Biol. a large, circulating white blood cell, formed in bone marrow and in the spleen, that ingests large foreign particles and cell debris. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: monocyte (Thesaurus) monocyclic Monod Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language