Metatheria

plural noun Meta·the·ria

Definition of Metatheria

  1. 1 :  a hypothetical group ancestral to placental mammals postulated to have reached a stage of development equivalent to that of the marsupials

  2. 2 in some classifications :  a group coextensive with Marsupialia

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Origin and Etymology of metatheria

New Latin, from meta- + -theria


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