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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Your body needs 20 amino acids to function, but only nine are classified as essential because your body can’t produce them on its own.
—
Jillian Kubala, Health, 5 Mar. 2026
This cream features a blend of keratin amino acids and rice protein to address dryness from inside the strands.
—Eden Stuart, Glamour, 5 Mar. 2026
Plant proteins also contain essential amino acids, but some may have lower amounts of certain amino acids.
—Carrie Madormo, Verywell Health, 5 Mar. 2026
Longmore noted that some of the complex molecules are thought to be precursors to amino acids, the building blocks of proteins.
—Asuka Koda, CNN Money, 5 Mar. 2026
See All Example Sentences for amino acid
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Jillian Kubala, Health, 5 Mar. 2026
This cream features a blend of keratin amino acids and rice protein to address dryness from inside the strands.
—Eden Stuart, Glamour, 5 Mar. 2026
Plant proteins also contain essential amino acids, but some may have lower amounts of certain amino acids.
—Carrie Madormo, Verywell Health, 5 Mar. 2026
Longmore noted that some of the complex molecules are thought to be precursors to amino acids, the building blocks of proteins.
—Asuka Koda, CNN Money, 5 Mar. 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 7 Mar. 2026.
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