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Related to monotreme: placental mammal
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.
[From New Latin Monotrēmata, order name : mono- + Greek trēma, trēmat-, perforation (from the fact that they have a single cloaca rather than an anus separate from genital and urinary orifices, as in placental mammals and marsupials); see terə- in Indo-European roots.]
mon′o·trem′a·tous (-trĕm′ə-təs) adj.
(Animals) any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. The group contains only the echidnas and the platypus
[C19: via New Latin from mono- + Greek trēma hole]
any egg-laying mammal of the order Monotremata, comprising only the duckbill and the echidnas of Australia and New Guinea.
The most primitive type of living mammal. Monotremes lay eggs, and the females have no teats but provide milk directly through the skin to their young. Monotremes include only the duck-billed platypus, found in Australia and New Guinea, and the echidnas, found only in New Guinea.
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|Noun||1.||monotreme - the most primitive mammals comprising the only extant members of the subclass Prototheria|
prototherian - primitive oviparous mammals found only in Australia and Tasmania and New Guinea
echidna, spiny anteater, anteater - a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
echidna, spiny anteater, anteater - a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea