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placental a. 胎盤的,胎座的
n. 有胎盤哺乳動物 胎盤的,胎座的有胎盤哺乳動物 placental adj 1: pertaining to or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals" [ant: {aplacental}] n 1: mammals having a placenta; all mammals except monotremes and marsupials [synonym: {placental}, {placental mammal}, {eutherian}, {eutherian mammal}] Placental \Pla*cen"tal\, a.
1. Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal. [1913 Webster] 2. (Zool.) Of or pertaining to the Placentalia. [1913 Webster] Placental \Pla*cen"tal\, n. (Zool.) One of the Placentalia. [1913 Webster]
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