|a.||1.||Of or pertaining to the placenta; having, or characterized by having, a placenta; |
|2.||(Zool.) Of or pertaining to the Placentalia.|
|n.||1.||(Zool.) One of the Placentalia.|
|Noun||1.||placental - mammals having a placenta; all mammals except monotremes and marsupials|
|Adj.||1.||placental - of or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals"|
aplacental - having no placenta; "monotremes and marsupials are aplacental mammals"