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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Leafy Greens Leafy greens contain both amino acids and vitamin C, which are essential for collagen production.
—
Angela Ryan Lee, Verywell Health, 11 Feb. 2026
At least 14 of the 20 amino acids used by life on Earth, and 19 other amino acids not used by life, have been identified in the sample from Bennu, which was delivered to Earth in September 2023.
—Keith Cooper, Space.com, 11 Feb. 2026
Choose Glycine for an Effective Sleep Aid Glycine is an amino acid that has shown promise in helping people fall asleep more deeply and wake up more alert the next day.
—Jenna Anderson, Health, 10 Feb. 2026
Urine also glows due to the presence of porphyrins and amino acids.
—New Atlas, 10 Feb. 2026
See All Example Sentences for amino acid
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Angela Ryan Lee, Verywell Health, 11 Feb. 2026
At least 14 of the 20 amino acids used by life on Earth, and 19 other amino acids not used by life, have been identified in the sample from Bennu, which was delivered to Earth in September 2023.
—Keith Cooper, Space.com, 11 Feb. 2026
Choose Glycine for an Effective Sleep Aid Glycine is an amino acid that has shown promise in helping people fall asleep more deeply and wake up more alert the next day.
—Jenna Anderson, Health, 10 Feb. 2026
Urine also glows due to the presence of porphyrins and amino acids.
—New Atlas, 10 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 15 Feb. 2026.
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