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单词 placentalia
释义

Placentalia


Plac`en`ta´li`a


n. pl.1.(Zool.) A division of Mammalia including those that have a placenta, or all the orders above the marsupials.

EncyclopediaSeeEutheria

placentalia


Eu·the·ri·a

(yū-thē'rē-ă), A subclass of mammals, excluding monotremes and marsupials, having a placenta through which the young are nourished. [eu- + G. thērion, animal]

placentalia

An obsolete term for a subclass of mammals that nourish their young via a placenta, now designated as Eutheria.
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