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
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.
The formula has evolved over the years to now include skin-boosting vitamins and amino acids. Clare Holden, Glamour, 6 Feb. 2025 On the other side lay an aqueous solution that was rich with L-serine, an amino acid that is critical for protein synthesis and cell proliferation. Gayoung Lee, Scientific American, 5 Feb. 2025 There are 20 types of amino acids, 11 of which are created within the body. Angelica Bottaro, Verywell Health, 30 Jan. 2025 Taurine is one of several amino acids found in eggs. Olivia Munson, USA TODAY, 30 Jan. 2025 See all Example Sentences for amino acid 

Word History

First Known Use

1897, in the meaning defined above

Time Traveler
The first known use of amino acid was in 1897

Dictionary Entries Near amino acid

Cite this Entry

“Amino acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amino%20acid. Accessed 11 Feb. 2025.

Kids Definition

amino acid

noun
ami·​no acid
ə-ˈmē-nō-
: any of numerous acids that include some which are the building blocks of proteins and are made by living cells from simpler compounds or are obtained in the diet

Medical Definition

amino acid

noun
: an amphoteric organic acid containing the amino group NH2
especially : alpha-amino acid

More from Merriam-Webster on amino acid

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