nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg) 同义词：yolk,
例句与用法
1.
I already enter the forth month today , growing up a little , i can eat one vitellus now , sometimes i also eat some molar biscurt , i want growing up chop - chop 今天我已经进入了第四个月，我又长大了点，现在我可以吃一个蛋黄了。有时我还会吃些磨牙饼干，我要快快长大。
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