/ Dictionary / Index M monosomic: Meaning and Definition of Find definitions for: mon•o•so•mic Pronunciation: (mon"u-sō'mik), [key] — adj. Genetics. having one less than the usual diploid number of chromosomes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. monosome monospermous Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language