||Mon`o*trem"a*ta (?), n.
pl. [NL., fr. Gr. mo`nos 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.
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