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    monotremes

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    UK

    A1
    n. pl.Noun (plural)A primitive order of mammals that lay eggs, including the echidnas and platypuses.
    Monotremes are unique among mammals because they lay eggs.

    Video subtitles

    Platypuses Aren't Weird, You Are

    13:49Platypuses Aren't Weird, You Are
    • And finally there are the monotremes, echidnas and platypuses, the egg laying mamm.

      And finally there are the monotremes, echidnas and platypuses, the egg laying mamm.

    • But monotremes are A more ancient branch of the mammal family tree dating back to more than 160 million years.

      But monotremes are A more ancient branch of the mammal family tree dating back to more than 160 million years.

    B2