endochorion

endochorion

(ĕn″dō-kō′rē-ŏn) [″ + chorion, chorion]
The inner chorion; the vascular layer of the allantois.

endochorion

the inner layer of the CHORION in the insect egg.
References in periodicals archive ?
Endochorion differs from the exochorion in the degree of homogenity of the rounded bodies and the density of its structure.