English > monotreme: 1 sense > noun 1, animal| Meaning | The most primitive mammals comprising the only extant members of the subclass Prototheria. |
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| Synonym | egg-laying mammal |
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| Narrower | echidna, spiny anteater, anteater | A burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites |
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| echidna, spiny anteater, anteater | A burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites |
| platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus | small densely furred aquatic monotreme of Australia and Tasmania / Tasmania having a broad bill and tail and webbed feet |
| Broader | prototherian | Primitive oviparous mammals found only in Australia and Tasmania / Tasmania and New Guinea |
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| Spanish | monotrema, monotremata |
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| Catalan | monotrema |
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