English
placentation
From placenta + -ation.
A compound of placenta + -ation
Proto-Hellenic *pləks
Ancient Greek πλάξ ‘flat’
Ancient Greek πλακοῦς ‘flat cake’
Ancient Greek πλακόεντα
New Latin placenta
English placenta
Today it means
noun The local fusion of the embryonic stage of an animal to its parent for physiological exchange to promote the growth and development of the young; involves a placenta in non-egglaying mammals.
Language periods are conventional ranges, not dates for this word.
Etymograph / placentation