yolk sac

Y y

Transcription

- US Pronunciation
- US IPA
- [yohk, yohlk sak]
- /yoʊk, yoʊlk sæk/

- US Pronunciation
- US IPA
- [yohk, yohlk sak]
- /yoʊk, yoʊlk sæk/

Definitions of yolk sac words

noun yolk sac an extraembryonic membrane that encloses the yolk of eggs in birds, reptiles, and marsupials and that circulates nourishment from the yolk to the developing embryo. 1
noun yolk sac a similar membrane in placental mammals that encloses a mostly hollow space and loses its nutritive function entirely as the placenta develops. 1
noun yolk sac the membranous sac that is attached to the ventral surface of the embryos of birds, reptiles, and some fishes and contains yolk 0
noun yolk sac the corresponding part in the embryo of mammals, which contains no yolk 0
noun yolk sac a saclike vascular membrane containing yolk, an outgrowth from the ventral surface of very yolky vertebrate embryos, as those of fishes, birds, or reptiles, that supplies nourishment to the embryo 0
noun yolk sac a homologous organ in most mammalian embryos that contains no yolk and that becomes a vestige at an early embryonic stage 0

See all 7 definitions of yolk sac

Information block about the term

Origin of yolk sac

First appearance:

before 1860

One of the 29% newest English words

First recorded in 1860-65

Historical Comparancy

Parts of speech for Yolk sac

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

Full grammatical hierarchy of Yolk sac

yolk sac popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 40% of English native speakers know the meaning and use word.

According to our data about 64% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

yolk sac usage trend in Literature

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