implacental /,implә'sentəl/ 📖 中文释义 n. 无胎盘动物a. (袋鼠等低等哺乳动物)无胎盘的 📘 English Definition(英文释义) a. Without a placenta, as marsupials and monotremes.n. A mammal having no placenta. ← implacably Implacentalia →