Is an onion example of a tuber?

A tuber is a specialized stem that grows underground and stores nutrients for the plant. Tubers are typically round or oval in shape and have a thick, fleshy texture. Some common examples of tubers include potatoes, sweet potatoes, and yams.

On the other hand, an onion is a bulb, which is a modified stem that grows underground and consists of multiple layers of fleshy leaves. Bulbs typically have a round or oval shape and are covered by a papery outer skin. Some other common examples of bulbs include garlic, shallots, and lilies.