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
Recent Examples on the Web
Key Ingredients: Keratin amino acids, hydrolyzed silk, argania spinosa kernel oil, jojoba seed oil, panthenol
More To Know: Cruelty-free, paraben-free, sulfate-free
How To Apply: Before blow drying, apply a small amount to hair and work through evenly.
—
Conçetta Ciarlo, Vogue, 18 Apr. 2025
Proper nutrition ensures that vitamin C, zinc, and amino acids support collagen formation internally, while topical use of sunblock can decrease collagen degradation caused by UV damage.
—Cierra Black, Essence, 18 Apr. 2025
Comparing sauerkraut with cabbage, the study authors showed that sauerkraut has more metabolites — the products produced during metabolic processes like digestion, including those that are linked to a healthy gut, like lactic and amino acids — than cabbage.
—Sam Walters, Discover Magazine, 15 Apr. 2025
Essential During Critical Illness, Injury, and Pregnancy The body needs high levels of glutamine during illness and injury due to the amino acid's important role in immune health.
—Jillian Kubala, Health, 3 Apr. 2025
See All Example Sentences for amino acid
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Conçetta Ciarlo, Vogue, 18 Apr. 2025
Proper nutrition ensures that vitamin C, zinc, and amino acids support collagen formation internally, while topical use of sunblock can decrease collagen degradation caused by UV damage.
—Cierra Black, Essence, 18 Apr. 2025
Comparing sauerkraut with cabbage, the study authors showed that sauerkraut has more metabolites — the products produced during metabolic processes like digestion, including those that are linked to a healthy gut, like lactic and amino acids — than cabbage.
—Sam Walters, Discover Magazine, 15 Apr. 2025
Essential During Critical Illness, Injury, and Pregnancy The body needs high levels of glutamine during illness and injury due to the amino acid's important role in immune health.
—Jillian Kubala, Health, 3 Apr. 2025
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 24 Apr. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share