Dictionary entry

Monotremata

Webster's Dictionary 1913

‖Mon′o‐trem″a‐ta (?), n. pl. [NL., fr. Gr. μόνοσ single + � hole.] (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.