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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
Their breakthrough revealed that the signal represented five amino acids—the fundamental building blocks of life.
—Tom Howarth
follow, Newsweek, 4 Nov. 2024
They’re loaded with a brightening and rejuvenating blend of vitamins, amino acids, minerals, and organic acids.
—Audrey Lee, Architectural Digest, 1 Nov. 2024
Key Ingredients: Vitamin C, rosehip oil, collagen, amino acids, grapeseed oil
Best For: Formulated for normal to dry skin types, the cream firms sagginess and brightens dark spots.
—Jenny Berg, Vogue, 31 Oct. 2024
Other key ingredients to look out for include vitamins, amino acids, and natural chemicals, which work to strengthen, hydrate, and regrow your hair.
—Alyssa Brascia, People.com, 29 Oct. 2024
See all Example Sentences for amino acid
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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 16 Nov. 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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