/ Dictionary / Index M monoclonal: Meaning and Definition of Find definitions for: mon•o•clo•nal Pronunciation: (mon"u-klōn'l), [key] — Biol. Biol. —adj. pertaining to cells or cell products derived from a single clone. —n. a monoclonal antibody or other monoclonal product. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: monoclonal (Thesaurus) monoclinous monoclonal antibody Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language