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Related to chorionic sac: Chorionic villi, extraembryonic mesoderm


see Sac and FoxSac and Fox,
closely related Native Americans of the Algonquian branch of the Algonquian-Wakashan linguistic stock (see Native American languages). Sac and Fox culture was of the Eastern Woodlands area with some Plains-area traits (see under Natives, North American).
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A soft-walled cavity within a plant or animal, often containing a special fluid and usually having a narrow opening or none at all.
Indentation in the contour lines of equal depth showing submarine relief.


a pouch, bag, or pouchlike part in an animal or plant


1. An early system on the Datatron 200 series.

[Listed in CACM 2(5):16 (May 1959)].
References in periodicals archive ?
A chorionic sac that is smaller than 5 mm at 5 weeks' gestation could be the first sign of abnormal gestational development.
By week 5 or in women with an HCG level of 1,200 mIU/mL, the chorionic sac should be visible in 95% of cases.
8) As the amniotic sac enlarges, it gradually obliterates the chorionic sac, with complete fusion by 12 weeks gestational age.

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