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placentation

[plas-uh n-tey-shuh n] /ˌplæs ənˈteɪ ʃən/
noun
1.
Anatomy, Zoology.
  1. the formation of a placenta.
  2. the manner of placement or construction of a placenta.
2.
Botany. the disposition or arrangement of a placenta or placentas.
Origin
1750-1760
1750-60; < French; see placenta, -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for placentation
  • Loss of egg yolk genes in mammals and the origin of lactation and placentation.
British Dictionary definitions for placentation

placentation

/ˌplæsɛnˈteɪʃən/
noun
1.
(botany) the way in which ovules are attached in the ovary
2.
(zoology)
  1. the way in which the placenta is attached in the uterus
  2. the process of formation of the placenta
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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placentation in Medicine

placentation plac·en·ta·tion (plās'ən-tā'shən)
n.

  1. Formation of a placenta in the uterus.

  2. 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.
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