Placentation

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Placentation \Plac`en*ta"tion\, n.
     1. (Anat.) The mode of formation of the placenta in different
        animals; as, the placentation of mammals.
        [1913 Webster]
  
     2. (Bot.) The mode in which the placenta is arranged or


        composed; as, axile placentation; parietal placentation.
        [1913 Webster]

From WordNet (r) 2.0 [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