: a crystalline essential amino acid C6H14N2O2 obtained from the hydrolysis of various proteins
Examples of lysine in a Sentence
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Nine essential amino acids—histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine—are available only through foods or supplements.
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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
Your body makes creatine from the amino acids lysine, arginine, and methionine.
—Jillian Kubala, Health, 17 Apr. 2025
That worked, producing more polymer, with a higher percentage of the polymer being lysine.
—John Timmer, Ars Technica, 17 Mar. 2025
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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
Your body makes creatine from the amino acids lysine, arginine, and methionine.
—Jillian Kubala, Health, 17 Apr. 2025
That worked, producing more polymer, with a higher percentage of the polymer being 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 10 Jun. 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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