Chorion

[kɒ:riɒn]

(noun.) the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals).

录入:麦克唐纳--From WordNet

(n.) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development.

(n.) The true skin, or cutis.

(n.) The outer membrane of seeds of plants.

校对:史蒂文

n. the outer fœtal envelope: the external membrane of the seeds of plants:—pl. Chō′ria.—adj. Chō′roid.

弗雷达录入