# placentation

> English word · Noun

## Definitions
1. 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.
2. The manner in which the seeds are attached to the placenta within the ovary locules.

## Etymology
From placenta + -ation.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/placentation