pro·chorion | \(ˈ)prō+\
plural prochorions or prochoria

Definition of prochorion 

: any of several structures surrounding the blastodermic vesicle in some animals (as rodents) especially : a gelatinous coat that is probably a secretion of the uterine glands

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Other Words from prochorion

prochorionic \(¦)prō+ \ adjective

History and Etymology for prochorion

New Latin, from pro- entry 1 + chorion

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