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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
The body needs amino acids—the building blocks of protein—for vital processes such as hormone and neurotransmitter synthesis, immune function, and more.
—Jillian Kubala, Health, 4 Sep. 2024
The gentle circulation of water, which never boils, and alkali works to break down the body to its natural elements: amino acids, peptides, salts, and sugars.
—New Atlas, 2 Sep. 2024
Suitable for sensitive and combination skin types, it is packed with amino acids, vitamins B and D from high-quality rice extract, and panthenol to rejuvenate the skin and enhance its glow.
—Priscilla Mak, Rolling Stone, 13 Aug. 2024
The company sells nutritional products focused on things like amino acids, vitamins and minerals to help people with their neurotransmitter health and ultimately mental wellbeing.
—Taylor Wilson, USA TODAY, 12 Aug. 2024
See all Example Sentences for amino acid
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'amino acid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
1897, in the meaning defined above
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 12 Sep. 2024.
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
Nglish: Translation of amino acid for Spanish Speakers
Britannica.com: Encyclopedia article about amino acid
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