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单词 prototherian
释义

Definition of prototherian in English:

prototherian

noun ˌprəʊtə(ʊ)ˈθɪərɪənˌprōdəˈTHirēən
Zoology

  • A mammal of the group Prototheria, which comprises the monotremes and their extinct relatives.

    Example sentencesExamples
    • Extant mammals, including prototherians (egg-laying mammals) and therians (marsupial and placental mammals), probably last shared a common ancestor about 160 million years ago.
adjective ˌprəʊtə(ʊ)ˈθɪərɪənˌprōdəˈTHirēən
Zoology

  • Relating to or denoting prototherians.

    Example sentencesExamples
    • They had a common ancestor more recently than either had with the monotremes or, probably, any other prototherian group.
    • In his classification of prototherian mammals Hopson queried the allocation of Haramiyidae to the Multituberculata.
 
 

Definition of prototherian in US English:

prototherian

nounˌprōdəˈTHirēən
Zoology

  • A mammal of the group Prototheria, which comprises the monotremes and their extinct relatives.

    Example sentencesExamples
    • Extant mammals, including prototherians (egg-laying mammals) and therians (marsupial and placental mammals), probably last shared a common ancestor about 160 million years ago.
adjectiveˌprōdəˈTHirēən
Zoology

  • Relating to or denoting prototherians.

    Example sentencesExamples
    • They had a common ancestor more recently than either had with the monotremes or, probably, any other prototherian group.
    • In his classification of prototherian mammals Hopson queried the allocation of Haramiyidae to the Multituberculata.
 
 
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更新时间：2026/6/15 6:16:43