Definition from Wiktionary, the free dictionary
See also: monotrème
- Hyphenation: mo‧no‧treme
monotreme (plural monotremes)
- (zoology) A mammal that lays eggs and has a single urogenital and digestive orifice. Only the echidnas and platypuses are included in this group.
monotreme (not comparable)
- (palynology, of a pollen grain) Having a single trema, or aperture.