蛋黄 (dàn huáng) literally means 'egg yellow' — combining 蛋 (dàn), meaning 'egg', and 黄 (huáng), meaning 'yellow'. It refers specifically to the round, nutrient-rich, golden-orange yolk found inside bird eggs, especially chicken eggs. Unlike the white (蛋白, dàn bái), the yolk is denser, richer in fat, vitamins, and minerals, and plays a key role in baking, cooking, and traditional medicine.

In everyday Chinese, 蛋黄 appears frequently in food descriptions, recipes, nutrition discussions, and health advice — for example, when talking about cholesterol or dietary balance. It’s also used metaphorically in idioms or expressions involving color or richness, though this is less common. The term is neutral in register and appropriate in both casual and formal contexts, from home kitchens to restaurant menus and scientific texts.