Defination cotyledon ?

A cotyledon is a seed leaf of a plant embryo that emerges from the seed upon germination. It is the first leaf-like structure that appears and serves as a source of stored food for the developing plant until it can produce its own nutrients through photosynthesis. Cotyledons can vary in shape, size, and number depending on the plant species.

A cotyledon (plural: cotyledons) is the first leaf or pair of leaves that emerges from a seedling during germination. It is typically a simple, often fleshy structure that contains a store of nutrients for the developing plant. Cotyledons are often photosynthetic and may continue to function as leaves after the first true leaves have emerged.

In dicotyledonous plants (dicots), the embryo typically has two cotyledons, which are commonly referred to as seed leaves. These cotyledons are usually opposite each other and are often oval or heart-shaped. In monocotyledonous plants (monocots), the embryo typically has only one cotyledon, which is often elongated and grass-like.

Cotyledons play an important role in the early growth and development of plants. They provide nutrients for the growing plant and help to anchor the seedling in the soil. Cotyledons also contain hormones that regulate plant growth.