pla·cen·tal /-əl/ 形容詞
胎盤的
Pla·cen·tal a.
1. Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal.
2. Zool. Of or pertaining to the Placentalia.
Pla·cen·tal, n. Zool. One of the Placentalia.
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placental
adj : of or having or occurring by means of a placenta; "all
mammals except monotremes and marsupials are placental
mammals" [ant: aplacental]
n : mammals having a placenta; all mammals except monotremes and
marsupials [syn: placental mammal, eutherian, eutherian
mammal]