amino acid
noun
: an amphoteric organic acid containing the amino group NH2
especially
: any of the various amino acids having the amino group in the alpha position that are the chief components of proteins and are synthesized by living cells or are obtained as essential components of the diet
Examples of amino acid in a Sentence
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Branched-Chain Amino Acids Branched-chain amino acids (BCAAs) are essential amino acids that your body doesn't naturally make.
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Kirstyn Hill, Health, 27 Feb. 2026
The formula packs 31 bond-building proteins and amino acids sourced from milk, wheat, corn, and soy, which work to smooth frizz, reduce breakage, and restore silky slip after just a few uses.
—Christa Joanna Lee, Allure, 26 Feb. 2026
Peptides are short chains of amino acids, which are the building blocks of proteins.
—Dominique Mosbergen, Time, 24 Feb. 2026
The evidence Peptides are chains of amino acids.
—Sarah Boden, NPR, 23 Feb. 2026
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Kirstyn Hill, Health, 27 Feb. 2026
The formula packs 31 bond-building proteins and amino acids sourced from milk, wheat, corn, and soy, which work to smooth frizz, reduce breakage, and restore silky slip after just a few uses.
—Christa Joanna Lee, Allure, 26 Feb. 2026
Peptides are short chains of amino acids, which are the building blocks of proteins.
—Dominique Mosbergen, Time, 24 Feb. 2026
The evidence Peptides are chains of amino acids.
—Sarah Boden, NPR, 23 Feb. 2026
See All Example Sentences for amino acid
Cite this Entry
“Amino acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amino%20acid. Accessed 5 Mar. 2026.
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