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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The smoothing system, a blend of ingredients, softens and moisturizes the hair’s cuticle to deeply condition, while the amino acid blend helps prevent breakage and keeps the scalp moisturized.
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Jamie Wilson, Glamour, 20 Feb. 2026
Edamame also contains tryptophan, an amino acid that helps support sleep.
—Heather Jones, Verywell Health, 20 Feb. 2026
High-protein foods rich in amino acids include lean meats like chicken and turkey, soy, nuts, seeds, beans, and fish such as salmon and tuna.
—Allison Forsyth, Health, 20 Feb. 2026
Its lower caffeine content and the presence of L-theanine – an amino acid found naturally in tea – may also promote a calmer, more sustained sense of focus.
—Daryl Austin, USA Today, 20 Feb. 2026
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Jamie Wilson, Glamour, 20 Feb. 2026
Edamame also contains tryptophan, an amino acid that helps support sleep.
—Heather Jones, Verywell Health, 20 Feb. 2026
High-protein foods rich in amino acids include lean meats like chicken and turkey, soy, nuts, seeds, beans, and fish such as salmon and tuna.
—Allison Forsyth, Health, 20 Feb. 2026
Its lower caffeine content and the presence of L-theanine – an amino acid found naturally in tea – may also promote a calmer, more sustained sense of focus.
—Daryl Austin, USA Today, 20 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 21 Feb. 2026.
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