As adjectives the difference between placental and nonplacental
is that placental is of or pertaining to the placenta, or to the Placentalia while nonplacental is not placental.
As a noun placental
is any animal that is a member of the Placentalia.
placental
English
Adjective
(-)
Of or pertaining to the placenta, or to the Placentalia
Having a placenta
Noun
(
en noun)
Any animal that is a member of the Placentalia