[ plə'sɛntə ]
■ noun ( plural ~e -ti: or ~s )
1》 a flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord.
2》 Botany (in flowers) part of the ovary wall to which the ovules are attached.
Origin
C17: from L., from Gk plakous , plakount- 'flat cake'.