Nearby Words

Placentation

[plas-uhn-tey-shuhn]

plac·en·ta·tion

[plas-uhn-tey-shuhn]
noun
1.
Anatomy, Zoology.
a.
the formation of a placenta.
b.
the manner of placement or construction of a placenta.
2.
Botany. the disposition or arrangement of a placenta or placentas.

Origin:
1750–60; < French; see placenta, -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Placentation is always a great word to know.
So is true rib. Does it mean:
a muscular, membranous or ligamentous wall separating the thoracic or chest cavity from the abdominal cavity in mammals
one member of the first seven pairs of ribs that are attached in humans to the sternum
Collins
World English Dictionary
placentation (ˌplæsɛnˈteɪʃən)
 
n
1.  botany the way in which ovules are attached in the ovary
2.  zoology
 a.  the way in which the placenta is attached in the uterus
 b.  the process of formation of the placenta

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

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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