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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Sulfur is the 10th most abundant element in the universe and a critical component of amino acids, proteins and enzymes on Earth.
—
Jacopo Prisco, CNN Money, 30 Jan. 2026
Under the Food, Drug, and Cosmetic Act, a dietary ingredient is defined as a vitamin, mineral, herb, or other botanical, or amino acid dietary substance to supplement your diet by increasing the total dietary intake.
—Rebeca Schiller, Verywell Health, 29 Jan. 2026
What was missing was clear proof that amino acids can join to form peptides under realistic conditions, rather than only in warm water on planets.
—William A. Haseltine, Forbes.com, 28 Jan. 2026
Biodegradable silks can be made hydrophilic or hydrophobic depending on the application, and Spiber has overcome the initial shrinkage problem in silk fibers using amino acid modification.
—Srishti Gupta, Interesting Engineering, 28 Jan. 2026
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Jacopo Prisco, CNN Money, 30 Jan. 2026
Under the Food, Drug, and Cosmetic Act, a dietary ingredient is defined as a vitamin, mineral, herb, or other botanical, or amino acid dietary substance to supplement your diet by increasing the total dietary intake.
—Rebeca Schiller, Verywell Health, 29 Jan. 2026
What was missing was clear proof that amino acids can join to form peptides under realistic conditions, rather than only in warm water on planets.
—William A. Haseltine, Forbes.com, 28 Jan. 2026
Biodegradable silks can be made hydrophilic or hydrophobic depending on the application, and Spiber has overcome the initial shrinkage problem in silk fibers using amino acid modification.
—Srishti Gupta, Interesting Engineering, 28 Jan. 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 1 Feb. 2026.
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