noun Embryology.
implantation of an embryo in the lining of the uterus.

1870–75 for an earlier sense; nid(us) + -ation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
nidation (naɪˈdeɪʃən)
physiol another name for implantation
[from Latin nīdus nest]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

nidation ni·da·tion (nī-dā'shən)
The implantation of the early embryo in the uterine mucosa.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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