MeSH definition : Cytoplasm stored in an egg that contains nutritional reserves for the developing embryo.
It is rich in polysaccharides, lipids, and proteins.;
MeSH synonym : yolk, egg; yolks, egg; egg yolks;
Wikipedia automatic translation : Yolk;
MeSH annotation : for both ovum nutrient & dietary portion of eggs;
Wikipedia link : https://en.wikipedia.org/wiki/Yolk;