1. placental - noun
· mammals having a placenta; all mammals except monotremes and marsupials
Synonym(s): placental_mammal, eutherian, eutherian_mammal
Hypernym(s): mammal, mammalian
2. placental - adjective
· pertaining to or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals"
Antonym(s): aplacental
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