Relating to the placenta.
* * *
pla·cen·tal -əl adj
1) of, relating to, having, involving, or produced by a placenta <\placental lactogen> <\placental defects>
2) of or relating to placental mammals
placental n PLACENTAL MAMMAL
* * *
pla·cen·tal (plə-senґtəl) 1. pertaining to the placenta. a 2. mammal whose young receive nourishment in utero by means of a placenta.Medical dictionary. 2011.