prototherian

Definitions of prototherian
  1. noun
    primitive oviparous mammals found only in Australia and Tasmania and New Guinea
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    egg-laying mammal, monotreme
    the most primitive mammals comprising the only extant members of the subclass Prototheria
    anteater, echidna, spiny anteater
    a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
    anteater, echidna, spiny anteater
    a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
    Ornithorhynchus anatinus, duck-billed platypus, duckbill, duckbilled platypus, platypus
    small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
    type of:
    mammal, mammalian
    any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
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