Definition of monorhine in English:

monorhine

Pronunciation /ˈmɒnərʌɪn/

noun

Zoology
  • A vertebrate with only one nasal passage; specifically an agnathan of a group so characterized.

Origin

Late 19th century (in an earlier sense). From scientific Latin Monorrhina, group name, later Monorhina from mono- + -rrhina.