The most primitive mammals comprising the only extant members of the subclass Prototheria. Synonym: egg-laying mammal.
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Words linked to "Monotreme" : duckbill, spiny anteater, echidna, anteater, platypus, duck-billed platypus, duckbilled platypus, Ornithorhynchus anatinus, egg-laying mammal, prototherian |
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