CHORION

chorion

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

Source: WordNet® 3.1

Etymology

Noun

chorion (plural chorions or choria)

(anatomy, biology) The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.

(biology, entomology) The outer case of an insect egg.

(botany) The outer membrane of seeds of plants.

Source: Wiktionary

Cho"ri*on, n. Etym: [NL., fr. Gr.

1. (Anat.) (a) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development. (b) The true skin, or cutis.

2. (Bot.)

Definition: The outer membrane of seeds of plants.

Source: Webster’s Unabridged Dictionary 1913 Edition

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