/ Dictionary / Index M monorhinous: Meaning and Definition of Find definitions for: mon•o•rhi•nous Pronunciation: (mon"u-rī'nus), [key] — adj. Zool. having a single, median nostril, as the cyclostomes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. monorchidism monorhyme Related Content Daily Word Quiz: maritime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language