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 All work with a menagerie of proteins and amino acids to soften hair, give it a glassy effect and eliminate flyaways without greasiness. Devon Abelman, Allure, 2 Oct. 2024 Find it on Amazon This Cleansing Foam Creates a Flawless Base Using green tea extract and amino acids, this cleansing foam deeply cleanses your face without drying your skin out or causing any irritation. Mia Meltzer, Rolling Stone, 27 Sep. 2024 Ingredients like castor oil and amino acid peptides, both nourishing ingredients that moisturise the hair and support hair growth, are also present. Venus Wong, refinery29.com, 27 Sep. 2024 The healthiest fish to eat are rich in nutrients like omega-3 fatty acids, iodine, selenium, vitamin D, and amino acids. Brittany Lubeck, Ms, Rdn, Verywell Health, 19 Sep. 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

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 8 Oct. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!