allantochorion

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noun

the allantochorion is a fusion of the chorion with the allantois and ensures gas exchange of the fetus.

Scrabble 19
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Meanings

nounallantochorion (plural allantochorions or allantochoria)

plural allantochorions · plural allantochoria

  1. the allantochorion is a fusion of the chorion with the allantois and ensures gas exchange of the fetus.

    Over the mouths of uterine glands, pig allantochorion is not directly attached to the endometrial epithelium but forms areolae, where uterine gland secretions are absorbed by trophoblast cells.

    2015 November 11, “Proteome Differences in Placenta and Endometrium between Normal and Intrauterine Growth Restricted Pig Fetuses”, in PLOS ONE, →DOI

Origin

From allanto- + chorion.

Full word history & related roots →
Cite this entry
APA

allantochorion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/allantochorion

MLA

“allantochorion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/allantochorion. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “allantochorion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/allantochorion.

Source: allantochorion on Wiktionary, CC BY-SA 4.0.