(yōk) noun. 1. a. The yellow, usually spherical portion of an egg of a bird or reptile, surrounded by the albumen and serving as nutriment for the developing young. b. A corresponding portion of the egg of other animals, consisting of protein and fat which serve as the primary source of nourishment for the early embryo and protoplasmic substances from which the embryo develops. 2. A greasy substance found in unprocessed sheep's wool, yolka
yolk noun. kuning telur; egg yolk, kuning telur, merah telur.
yolk sac fry anak ikan beryolka
yolk sac yŌk săk) 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 and functioning as the circulatory system of the human embryo before internal circulation begins, pundi yolka