: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins
Examples of lysine in a Sentence
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The amino acids required for collagen synthesis, particularly glycine, proline, and lysine, are readily available from a wide range of foods including eggs, fish, poultry, dairy products, legumes, soy foods and meat.
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Leeann Weintraub, Daily News, 5 Feb. 2026
Boiling the bones over a long period of time causes amino acids (protein building blocks), such as glycine, arginine, and lysine, to leach out into the liquid.13 These amino acids have anti-inflammatory properties.
—Sarah Bence, Verywell Health, 29 Jan. 2026
Your body makes creatine from the amino acids lysine, arginine, and methionine.
—Jillian Kubala, Health, 23 Jan. 2026
The approach relies on engineering cells to produce a glowing version of lysine.
—Neetika Walter, Interesting Engineering, 24 Oct. 2025
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Leeann Weintraub, Daily News, 5 Feb. 2026
Boiling the bones over a long period of time causes amino acids (protein building blocks), such as glycine, arginine, and lysine, to leach out into the liquid.13 These amino acids have anti-inflammatory properties.
—Sarah Bence, Verywell Health, 29 Jan. 2026
Your body makes creatine from the amino acids lysine, arginine, and methionine.
—Jillian Kubala, Health, 23 Jan. 2026
The approach relies on engineering cells to produce a glowing version of lysine.
—Neetika Walter, Interesting Engineering, 24 Oct. 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 17 Feb. 2026.
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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