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Pronunciation

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  • IPA (key): /ˈkɒləd͡ʒən/ or /ˈkɒləd͡ʒɪn/
  • (file)

Singular
collagen

Plural
collagens

  1. (countable & uncountable) (biochemistry) Collagen is a group of naturally occurring proteins. In nature, it is found exclusively in animals, especially in the flesh and connective tissues of mammals.