单词 | placentation |
释义 | placentation /plas'euhn tay"sheuhn/, n. 1. Anat. , Zool. a. the formation of a placenta. b. the manner of placement or construction of a placenta. 2. Bot. the disposition or arrangement of a placenta or placentas. [1750-60; < F; see PLACENTA, -ATION] |
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