WordReference Random House Unabridged Dictionary of American English © 2026
mon•o•rhi•nous
(mon′ə rī′nəs),USA pronunciation adj. [Zool.]
- having a single, median nostril, as the cyclostomes.
- Greek -rhinos -nosed, adjective, adjectival derivative of rhīs, stem rhin- nose; see -ous
- mono- + -rhinous 1900–05