: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins
Examples of lysine in a Sentence
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Oysters contain an inordinate amount of zinc and copper, and the amino acids proline and lysine, precursors of collagen.
—
Alessandra Signorelli, Vogue, 1 July 2025
It is manufactured from lysine (an amino acid) and can suppress the production of the pigment melanin.2
Jump to Key Takeaways.
—Heather Jones, Verywell Health, 19 June 2025
Nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine—are available only through foods or supplements.
—Stacey Colino, Time, 27 May 2025
So, the researchers put in extra copies of the genes needed to produce one specific amino acid (lysine).
—John Timmer, Ars Technica, 17 Mar. 2025
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Alessandra Signorelli, Vogue, 1 July 2025
It is manufactured from lysine (an amino acid) and can suppress the production of the pigment melanin.2
Jump to Key Takeaways.
—Heather Jones, Verywell Health, 19 June 2025
Nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine—are available only through foods or supplements.
—Stacey Colino, Time, 27 May 2025
So, the researchers put in extra copies of the genes needed to produce one specific amino acid (lysine).
—John Timmer, Ars Technica, 17 Mar. 2025
See All Example Sentences for lysine
Cite this Entry
“Lysine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lysine. Accessed 8 Jul. 2025.
Copy CitationKids Definition
lysine
noun
ly·sine
ˈlī-ˌsēn 
: an essential amino acid obtained from various proteins
Medical Definition
lysine
noun
ly·sine
ˈlī-ˌsēn
: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins
—abbreviation Lys
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