chorion


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Related to chorion: chorion laeve, chorion frondosum

cho·ri·on

 (kôr′ē-ŏn′)
n.
The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta.

[Greek khorion; see gherə- in Indo-European roots.]

cho′ri·on′ic (-ŏn′ĭk) adj.

chorion

(ˈkɔːrɪən)
n
(Anatomy) the outer of two membranes that form a sac around the embryonic reptile, bird, or mammal: contributes to the placenta in mammals. See also amnion
[C16: from Greek khorion afterbirth]
ˌchoriˈonic, ˈchorial adj

cho•ri•on

(ˈkɔr iˌɒn, ˈkoʊr-)

n.
1. the outermost of the membranes enclosing the embryo in reptiles, birds, and mammals, developing into part of the eggshell or part of the placenta.
2. a membrane enclosing the shell of an insect egg.
[1535–45; < Greek chórion afterbirth]
cho`ri•on′ic, cho′ri•al, adj.

cho·ri·on

(kôr′ē-ŏn′)
The outer membrane that encloses the embryo of a reptile, bird, or mammal. In mammals, the chorion contributes to the development of the placenta.

chorion

The embryo’s outer membrane, which helps to form the placenta.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
amniote - any member of the Amniota
chorionic villus - one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta
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

cho·ri·on

n. corión, una de las dos membranas que rodean al feto.
References in periodicals archive ?
Both the zebrafish embryo and the chorion, the outermost membrane surrounding the zebrafish embryo, are transparent, allowing for direct microscopic observation and evaluation throughout the entire developmental process (Hisaoka, 1958; Hisaoka and Battle, 1958).
78 CHANGES IN THE CHORION DUE TO FERTILIZATION AND EXTENDED INCUBATION IN THE CALIFORNIA GRUNION, LEURESTHES TENUIS
DISCUSSION: Four days after fertilization the trophoblast chorion differentiates, if the split occurs before this time monozygotic twin will implant as separate blastocyst with their own amnion and chorion.
Composed of two foetal cell layers, the amnion and chorion, foetal membranes play an important role in maintaining pregnancy through gestation.
Amniopur, described as a multipurpose, chorion free, cryopreserved allograft, was used in a lumbar spinal procedure in the United States.
Blanks were referred to as individual eggs within the egg mass that had no embryo inside of the chorion.
Among Classic's properties: Casper The Friendly Ghost, Where's Waldo?, Lassie, The Lone Ranger (licensed to Disney for a live action feature being produced by Jerry Bruckheimer for 2013 release), and George Of The Jungle; Christmas specials Frosty The Snowman, Rudolph The Red-Nosed Reindeer, and Santa Claus Is Comin" To Town; Veggie Tales (via Big Idea Entertainment); Olivia and Noddy, acquired this year from Chorion; comic book archives and media rights to Golden Books; and management of the Jay Ward catalog, including Rocky and Bullwinkle (via joint venture with Jay Ward Productions).
Scientists report that placental stem cells with important therapeutic properties can be harvested in large quantities from the fetal side of human term placentas (called the chorion).
Mr.Men O Little Miss O Copyright [umlaut] 2011 THOIP (a Chorion Company).
Reproduced with the kind permission of Chorion Rights Limited.
British media group Chorion plans to make a takeover bid for entertainment distribution company Hit Entertainment, the Sunday Times reported, without citing sources.
pacifica "larvae" never hatch, and they undergo metamorphosis within the chorion. Molgula pugetiensis is a molgulid ascidian found in the San Juan Islands, but its development has not been reported.