monotreme

About 0.02 uses per million words.

Meaning

1. noun Any of the order Monotremata of mammals that lay eggs and have single orifices for urogenital and digestive functions (cloaca); an echidna, platypus or one of their extinct relatives.
2. adjective Having a single trema, or aperture.

Similar words

egg-laying mammal prototherian monopisthocotylean monophage implacental eutypomyid platypus monodactylid monommid echidna

Often followed by

mammals and egg tachyglossus mammal specialist species is

Word family

monotremes