Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
choroid plexus
chorten
chortle
chorus
chorus boy
chorus girl
chorus line
-chory
chose
chosen
chosen people
choss
chota
chott
chouette
chough
chouse
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

chorion
cho·ri·on [ káwree òn ] (plural cho·ri·ons)


noun 
Definition:
 
outer membrane surrounding embryo: the outer membrane enclosing the embryo of mammals, reptiles, and birds. It has a dense concentration of blood vessels and aids in the formation of the placenta in mammals.
See also  amnion (sense 1)

[Mid-16th century. < Greek khorion]

cho·ri·on·ic [ kàwree ónnik ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft