도토리, or acorns, are the nuts produced by oak trees. They are typically round or oval in shape and can vary in size and color, ranging from green to brown. In many cultures, 도토리 are used as food for both humans and animals, particularly in regions where oak trees are abundant. In Korean cuisine, 도토리 is often ground into flour to make dishes like 도토리묵, a jelly-like food. The nuts are also rich in nutrients, providing a source of carbohydrates, fats, and proteins. Additionally, 도토리 plays a significant role in the ecosystem, serving as a food source for various wildlife, including squirrels and birds.