Definition of monotrematous in English:

monotrematous

adjective

Zoology
rare
  • Monotreme; resembling the monotremes; (more generally) having a single aperture.

Origin

Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From Monotremata + -ous.

Pronunciation

monotrematous

/ˌmɒnə(ʊ)ˈtrɛmətəs//ˌmɒnə(ʊ)ˈtriːmətəs/