placenta
Concise Oxford English Dictionary © 2008 Oxford University Press:
placenta /pləˈsɛntə/
▶noun (pl. placentae /-tiː/ or placentas)
- 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’.
'placenta' also found in these Oxford entries:

