Allantois

nounverified·updated May 18, 2026

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the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

Framework senses

2 senses across 2 frameworks

Wordset Dictionary1 senseview framework →

§1: the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

Legacy lexicon import1 senseview framework →

§1 · legacy_primary: the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)
DR-088 backfill from the noun definition column