- the formation of a placenta.
- the manner of placement or construction of a placenta.
Botany. the disposition or arrangement of a placenta or placentas.
Origin of placentation
dating back to 1750–60;
see origin at placenta
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for placentation
Historical Examples of placentation
British Dictionary definitions for placentation
botany the way in which ovules are attached in the ovary
- the way in which the placenta is attached in the uterus
- the process of formation of the placenta
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Formation of a placenta in the uterus.
The type or structure of a placenta.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.