Definition of collagen in English:



  • [mass noun] The main structural protein found in skin and other connective tissues, widely used in purified form for cosmetic surgical treatments.

    ‘vitamin C plays a vital role in the formation of collagen’
    [as modifier] ‘she was given a collagen injection to smooth out wrinkles in her forehead’
    • ‘Without dietary vitamin C, the human animal cannot properly synthesize collagen.’
    • ‘Among these, collagen is the major structural protein and is the most abundant in the human body.’
    • ‘The protein collagen is responsible for the tough qualities of connective tissue.’
    • ‘A protein called collagen leaks out from around the injured areas, causing inflammation.’
    • ‘Protein is crucial for the production of collagen and elastin, the protein fibres that keep skin supple and elastic’


Mid 19th century: from French collagène, from Greek kolla glue + French -gène (see -gen).