Hypertext Webster Gateway: "placentation"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Placentation \Plac`en*ta"tion\, n.
1. (Anat.) The mode of formation of the placenta in different
animals; as, the placentation of mammals.
2. (Bot.) The mode in which the placenta is arranged or
composed; as, axile placentation; parietal placentation.
From WordNet (r) 1.7 (wn)
placentation
n 1: the formation of the placenta in the uterus
2: arrangement of the ovules in the placenta and of the
placentas in the ovary
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