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English definition of “collagen”

collagen

noun [U]     /ˈkɒl.ə.dʒən/ US  /ˈkɑː.lə-/
a protein found especially in the joints (= places where two bones are connected ) of humans and animals Substances and structures in the body collagen implant/injection an injection of collagen into the lips or skin to make the lips appear larger or the skin appear younger and smoother Surgery
(Definition of collagen noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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