chorion

[ kawr-ee-on, kohr- ]
/ ˈkɔr iˌɒn, ˈkoʊr- /

noun

Embryology. the outermost of the extraembryonic membranes of land vertebrates, contributing to the formation of the placenta in the placental mammals.
Zoology. the membrane around the eggs of certain insects, secreted by cells of the ovary.

Origin of chorion

1535–45; < New Latin < Greek chórion membrane enclosing the fetus

OTHER WORDS FROM chorion

cho·ri·on·ic, cho·ri·al, adjective sub·cho·ri·on·ic, adjective

Words nearby chorion

chorioid, chorioid-, chorioido-, chorioma, choriomeningitis, chorion, chorionic epithelioma, chorionic gonadotrophin, chorionic gonadotropin, chorionic growth hormone-prolactin, chorionic villus

Example sentences from the Web for chorion

British Dictionary definitions for chorion

chorion
/ (ˈkɔːrɪən) /

noun

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

Derived forms of chorion

chorionic or chorial, adjective

Word Origin for chorion

C16: from Greek khorion afterbirth

Medical definitions for chorion

chorion
[ 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.

Other words from chorion

cho′ri•on′ic (-ŏn′ĭk) adj.

Scientific definitions for chorion

chorion
[ 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.