eutherian adjective & noun.
[ju:'Ɵɪǝrɪǝn] L19.[from mod. Latin Eutheria (see below), formed as EU- + Greek thēria pl. of thērion wild animal: see -AN.](Pertaining to or designating) an animal of the infraclass Eutheria, comprising all mammals which develop a placenta (as opp. to marsupials and monotremes).
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