amnion


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Related to amnion: yolk sac, amnion nodosum

am·ni·on

 (ăm′nē-ən, -ŏn′)
n. pl. am·ni·ons or am·ni·a (-nē-ə)
A tough, thin membrane that forms a sac enclosing the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo or fetus is suspended.

[New Latin, from Greek amneion, variant of amneios, amnion, and from amnion, amnion, both from amnos, lamb; akin to Irish úan, Latin agnus, and Old Church Slavonic agnę, lamb.]

am′ni·ot′ic (-ŏt′ĭk), am′ni·on′ic (-ŏn′ĭk) adj.

amnion

(ˈæmnɪən)
n, pl -nions or -nia (-nɪə)
(Zoology) the innermost of two membranes enclosing an embryonic reptile, bird, or mammal. See also chorion
[C17: via New Latin from Greek: a little lamb, from amnos a lamb]

am•ni•on

(ˈæm ni ən)

n., pl. -ni•ons, -ni•a (-ni ə)
the innermost membrane of the sac surrounding the embryo in reptiles, birds, and mammals, enclosing the amniotic fluid.
[1660–70; < Greek amníon, derivative of amnós lamb (see yean)]
am`ni•ot′ic (-ˈɒt ɪk) am`ni•on′ic, adj.

am·ni·on

(ăm′nē-ən)
A sac of thin, tough membrane containing a watery liquid in which the embryo of a reptile, bird, or mammal is suspended. ♦ The watery fluid in the amnion is called amniotic fluid.
amniocentesis, amnion - Amniocentesis is formed by amnion, the innermost membrane enclosing a fetus, and Greek kentesis, "pricking."
See also related terms for mammal.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amnion - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)amnion - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
amniote - any member of the Amniota
mammal, mammalian - any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
fetal membrane - any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus
sac - a structure resembling a bag in an animal
Translations

amnion

[ˈæmnɪən] n (amnions or amnia (pl)) [ˈæmnɪə]amnio

am·ni·on

n. amnios, saco membranoso que envuelve el embrión.
References in periodicals archive ?
2] The Kovalevsky or neurenteric canal is defined as a canal connecting the neural tube and archenteron in the embryo, resulting from a persisting abnormal communication between the notochord and yolk sac and the amnion during an early stage of embryonic development.
Here the chorion and amnion are folded upon themselves at the placental margin making the chorionic plate on the foetal side smaller than the basal plate on the maternal side leaving a part of the placenta uncovered at the periphery (1).
Processed using the Clearify method, Revita preserves amnion, chorion and the intermediate layer of the membrane, making it the ideal barrier membrane in surgical applications and the optimal wound covering for chronic wounds.
The study confirms the observation of previous investigators who consider amnion transplantation an efficient therapeutic method for a multitude of eye diseases.
A multitude of injection therapies are available and effective; hyaluronic acid, platelet-rich plasma (PRP), and amnion therapy all function to reduce pain in arthritic joints.
Placental tissues were available from 4 neonates; common findings were fibrinoid necrosis, chorangiosis, and amnion hyperplasia.
The amnion," I wrote many years ago, "is an object that belongs to the world of the dead--or that of the non-born.
Other techniques, such as using buccal mucosa, amnion, inert materials and autologous in vitro grow vaginal tissue are less commonly used procedures in patients with Mullarian agenesis.
Surgical treatment involves excision of fibrotic tissues followed by covering of the defect with split thickness skin grafting, fresh amnion, or BFP grafts, tongue flap, bilateral forearm free flaps, nasolabial flap.
Treatment of chronic ulcer is ultraviolet rays, amnion for epithelisation, chorion for formation of granulation tissue and skin grafting.