/ Dictionary / Index M monorchid: Meaning and Definition of Find definitions for: mo•nor•chid Pronunciation: (mu-nôr'kid), [key] —adj. having or appearing to have only one testis. —n. a monorchid individual. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. monorail monorchidism Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language