chorioallantois

chorioallantois

n. a very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois.
Syn. -- chorioallantoic membrane.
[WordNet 1.5]

Cho"ri*on

(?), n. [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.
[1913 Webster]

2. (Bot.) The outer membrane of seeds of plants.
[1913 Webster]

Cho"ri*sis

(?), n. [NL., fr. Gr. separation.] (Bot.) The separation of a leaf or floral organ into two more parts.
[1913 Webster]

In collateral chorisis the parts are side by side. -- In parallel or median chorisis they are one in front of another.
[1913 Webster]

 

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Tue 18th December 2018