monotreme

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Related to monotrematous: Monotremata

mon·o·treme

(mon'ō-trēm),
A member of the order Monotremata.

monotreme

(mŏn′ə-trēm′)
n.
Any of various egg-laying mammals of the order Monotremata of Australia and New Guinea, whose only living members are the platypus and the echidnas.

mon′o·trem′a·tous (-trĕm′ə-təs) adj.

monotreme

any mammal of the primitive subclass Monotremata, including the duck-billed platypus and spiny anteater. Monotremes differ from other mammals in laying eggs, and in having a single opening (CLOACA) for the passage of eggs or sperm, faeces and urine. They inhabit Australia and New Guinea.

monotreme

a member of the animal order of Momotremata, the egg-laying mammals. Includes only two species, the duck-billed platypus and the spiny anteater.