Related Content
- Daily Word Quiz: stringent
- Analogy of the Day: Today’s Analogy
- Spelling Bee: Today’s Spelling Bee
- Frequently Misspelled Words
- Frequently Mispronounced Words
- Easily Confused Words
- Writing & Language
allantois: Meaning and Definition of
al•lan•to•is
Pronunciation: (u-lan'tō-is, -tois), [key]
— n. Embryol., Zool.
- a vascular, extraembryonic membrane of birds, reptiles, and certain mammals that develops as a sac or diverticulum from the ventral wall of the hindgut.
See also:
- allantois (Thesaurus)
