Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
A membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals.
Definition source: English Wiktionary via Wiktextract
Topics: anatomy, medicine, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: sac
noun
membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: vitelline sac, umbilical vesicle, vesicula umbilicus
Antonyms: none provided
Broader terms: sac
History
No etymology was provided for this word.
