monotremata Meaning, Definition & Usage

  1. noun coextensive with the subclass Prototheria
    order Monotremata.

WordNet

Mon`o*trem"a*ta noun plural
Etymology
NL., fr. Gr. single + hole.
Definitions
  1. (Zoöl.) A subclass of Mammalia, having a cloaca in which the ducts of the urinary, genital, and alimentary systems terminate, as in birds. The female lays eggs like a bird. See Duck mole, under Duck, and Echidna.

Webster 1913