collagen
noun
col·la·gen
ˈkä-lə-jən 
: any of a group of fibrous proteins that occur in vertebrates as the chief constituent of connective tissue fibrils and in bones and yield gelatin and glue upon boiling with water
Examples of collagen in a Sentence
Recent Examples on the Web
Hydrolyzed collagen keeps skin feeling firm and bouncy, while niacinamide strengthens your moisture barrier to lock in hydration.
—
Jeaneen Russell, PEOPLE, 5 Dec. 2025
Liquid collagen may improve skin elasticity and reduce wrinkles.
—Wendy Wisner, Health, 5 Dec. 2025
In-office treatments like laser resurfacing and microneedling can help boost collagen production and firm up the skin.
—Kiana Murden, Vogue, 4 Dec. 2025
The products contain a signature complex called Mesotides, which is made from active ingredients such as marine collagen, oligopeptide-1 and red algae extract.
—Samantha Conti, Footwear News, 3 Dec. 2025
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Jeaneen Russell, PEOPLE, 5 Dec. 2025
Liquid collagen may improve skin elasticity and reduce wrinkles.
—Wendy Wisner, Health, 5 Dec. 2025
In-office treatments like laser resurfacing and microneedling can help boost collagen production and firm up the skin.
—Kiana Murden, Vogue, 4 Dec. 2025
The products contain a signature complex called Mesotides, which is made from active ingredients such as marine collagen, oligopeptide-1 and red algae extract.
—Samantha Conti, Footwear News, 3 Dec. 2025
See All Example Sentences for collagen
Cite this Entry
“Collagen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/collagen. Accessed 8 Dec. 2025.
Copy CitationKids Definition
collagen
noun
col·la·gen
ˈkäl-ə-jən
: a protein that occurs in the form of fibers, does not dissolve, is found in connective tissue, and forms glue and gelatin upon boiling with water
Medical Definition
collagen
noun
col·la·gen
ˈkäl-ə-jən
: an insoluble fibrous protein of vertebrates that is the chief constituent of the fibrils of connective tissue (as in skin and tendons) and of the organic substance of bones and yields gelatin and glue on prolonged heating with water
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