Definition of Amnion

1. Noun. Thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals).

Exact synonyms: Amnios, Amniotic Sac
Group relationships: Amniote, Fetal Membrane
Category relationships: Mammal, Mammalian
Generic synonyms: Sac
Derivative terms: Amnic, Amnionic, Amniotic

Definition of Amnion

1. n. A thin membrane surrounding the embryos of mammals, birds, and reptiles.

Definition of Amnion

1. a membranous sac enclosing an embryo [n -NIONS or -NIA] : AMNIC, AMNIONIC, AMNIOTIC [adj]

Medical Definition of Amnion

1. A thin but tough extraembryonic membrane of reptiles, birds and mammals that lines the chorion and contains the foetus and the amniotic fluid around it, in mammals it is derived from trophoblast by folding or splitting. (05 Feb 1998)

Lexicographical Neighbors of Amnion

amnio-
amniocardiac vesicle
amniocele
amniocenteses
amniocentesis
amniocentesis
amniochorial
amniochorionic
amniocyte
amnioembryonic junction
amniogenesis
amniogenic cells
amniography
amnioma
amnion (current term)
amnion (current term)
amnionic
amnionic
amnionic fluid
amnionitis
amnions
amnion nodosum
amnion ring
amniorrhexis
amniorrhoea
amnios
amnioscope
amnioscopy
amniota
Amniota

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