Definitions

1. noun

the plural of placenta, referring to the afterbirth or the organ that nourishes a fetus in the uterus of a female mammal.

“The veterinarian carefully examined the placentae of the newborn calves.”

2. noun

the organ that attaches a fetus to its mother’s uterus and supplies it with oxygen and nutrients during pregnancy.

“During the birth, the doctor examined the placenta, which had detached from the uterus.”