collagen
Collagen (noun) means a tough, fibrous protein that gives structure to skin, bones, tendons, and other connective tissue in animals. Example: “Collagen levels in the skin naturally decline with age.”
How to use collagen
Learner’s notesIn plain EnglishA key structural protein in skin, joints, and bones, often marketed in supplements and skincare.
Word forms
- Plural
- collagens
Fill the gap
Can you complete this real example?
_____ levels in the skin naturally decline with age.
Etymology
From French collagène, built from Greek kolla ("glue") and -genes ("producing") — it's the substance animal-based glue was traditionally made from.