Collagen (noun)

1. A fibrous protein that is the main component of connective tissue, such as skin, tendons, and cartilage.
2. A protein that gives strength and support to various parts of the body, including the skin, bones, and tendons.

Origin:

The word collagen comes from the greek word kolla meaning glue and -gen meaning producing. it was first used in the english language in the early 20th century.

Examples:

1. Collagen is an important component of skin.
2. Collagen supplements are taken to improve skin, hair, and nail health.
3. Collagen production decreases as we age.
4. Collagen is a vital protein for wound healing.
5. Collagen is a component of many cosmetic products.