WORD ORIGIN noun, plural am·ni·ons, am·ni·a . [ am-nee- uh] /ˈæm ni ə/ . Anatomy, Zoology the innermost of the embryonic or fetal membranes of reptiles, birds, and mammals; the sac in which the embryo is suspended. . Zoology a similar membrane of insects and other invertebrates. Origin of amnion 1660–70;
) lamb (see
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for amnia noun plural -nions or -nia ( -nɪə) the innermost of two membranes enclosing an embryonic reptile, bird, or mammal See also chorion Word Origin for amnion
C17: via New Latin from Greek: a little lamb, from
amnos a lamb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for amnia n.
1660s, Modern Latin, from Greek
amnion "membrane around a fetus," said to be originally "bowl in which the blood of victims was caught" [Liddell & Scott], which is variously said to be of unknown origin, from ame "bucket," or a diminutive of amnos "lamb."
Online Etymology Dictionary, © 2010 Douglas Harper
n. pl. am•ni•ons The thin, membranous sac filled with a serous fluid in which the embryo or fetus is enclosed and suspended in the uterus. amniotic sac Related forms am′ni•ot ( ′ic -ŏt) null ′ĭk adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
A thin, membranous sac filled with a watery fluid (called the amniotic fluid) in which the embryo or fetus of a reptile, bird, or mammal is suspended during prenatal development. Also called amniotic sac
The American Heritage® Science Dictionary
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