be·​ta·​ine | \ ˈbē-tə-ˌēn How to pronounce betaine (audio) \

Definition of betaine

: a sweet crystalline quaternary ammonium salt C5H11NO2 obtained especially from sugar beets also : its hydrate or its hydrochloride

Examples of betaine in a Sentence

Recent Examples on the Web

Philip Kingsley Exfoliating Scalp Mask This mask contains betaine salicylate, a gentle chemical exfoliant that helps slough off dead skin cells and flakes. Rachel Charlene Lewis, SELF, "3 Scalp Masks for Dandruff That Didn’t Dry Out My Curly Hair," 28 May 2018 The website also comments that one of the active ingredients in beetroot juice - betaine - may have mild side effects such as: nausea, stomach upset, and diarrhea., "Optimum performance: Beetroot juice can power your performance," 9 Feb. 2018 Paired with the plant extract betaine, which is known for its anti-inflammatory properties, this powerful duo helps rev up cells, making them more receptive to anti-aging formulas. Lisa Desantis,, "This Anti-Aging Serum Was Developed by Harvard Scientists—and I'm Obsessed With It," 8 Jan. 2018 Follow with lukewarm water and a dime-size amount of cleanser (look for the ingredients cocamidopropyl betaine or caprylic triglyceride, which are sulfate-free surfactants) on your fingers or a clean, damp washcloth. Gina Way, Marie Claire, "This Is How You Should *Really* Be Washing Your Face," 12 Sep. 2017 The shampoo contains sodium laureth sulfate, cocamidopropyl betaine, dimethicone and peppermint leaf extract. Atlanta Life, ajc, "Where can I find it?," 11 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'betaine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of betaine

1870, in the meaning defined above

History and Etymology for betaine

International Scientific Vocabulary, from Latin beta beet

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Time Traveler for betaine

The first known use of betaine was in 1870

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More Definitions for betaine


be·​ta·​ine | \ ˈbēt-ə-ˌēn How to pronounce betaine (audio) \

Medical Definition of betaine

: a sweet crystalline quaternary ammonium salt C5H11NO2 that was first isolated in beet juice and is used to treat homocystinuria and is also used in the form of its hydrochloride C5H11NO2·HCl as a source of hydrochloric acid especially to treat hypochlorhydria

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to shake or wave menacingly

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