acetic acid

ace·​tic acid | \ ə-ˈsē-tik- How to pronounce acetic acid (audio) \

Definition of acetic acid

: a colorless pungent liquid acid C2H4O2 that is the chief acid of vinegar and that is used especially in synthesis (as of plastics)

Examples of acetic acid in a Sentence

Recent Examples on the Web The Moderna vaccine ingredient list is similar with mRNA, lipids, tromethamine, tromethamine hydrochloride, acetic acid, sodium acetate trihydrate, and sucrose. Bruce Y. Lee, Forbes, 18 May 2021 As a control, Crook injected seven other animals with saline instead of acetic acid. Anna Blaustein, Scientific American, 23 Apr. 2021 The next day, in another part of the lab, Crook injected a small bead of acetic acid into one of the octopus’s arms. Anna Blaustein, Scientific American, 23 Apr. 2021 What most surprised the researchers was the presence of bacteria that produce acetic acid, which is present in vinegar, in about 30% of the starters. ABC News, 4 Apr. 2021 Though the research on acetic acid's benefits looks promising, nothing's definitive. Sandee Lamotte, CNN, 24 Mar. 2021 The fermentation process of turning apple cider into vinegar creates a compound called acetic acid, which has proven antibacterial and antifungal properties. Bryony Gilbey,, 20 Mar. 2021 But studies do show acetic acid can be used as one tool in helping people lower blood sugar. Sandee Lamotte, CNN, 10 Mar. 2021 Because acetic acid easily bonds with volatile molecules, a light mist of it will banish odor from your house. Dan Seitz, Popular Science, 10 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'acetic acid.' 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 acetic acid

1788, in the meaning defined above

History and Etymology for acetic acid

acetic borrowed from French acétique, from Latin acētum "sour wine, vinegar" (noun derivative from *acētus, verbal adjective of acēre "to be sour," going back to Indo-European h2eḱ-eh1- "to be sharp") + French -ique -ic entry 1 — more at edge entry 1

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Time Traveler for acetic acid

Time Traveler

The first known use of acetic acid was in 1788

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Statistics for acetic acid

Last Updated

29 May 2021

Cite this Entry

“Acetic acid.” Dictionary, Merriam-Webster, Accessed 16 Jun. 2021.

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More Definitions for acetic acid

acetic acid


Medical Definition of acetic acid

: a colorless pungent liquid acid C2H4O2 that is the chief acid of vinegar and that is used especially in synthesis (as of plastics) and occasionally in medicine as an astringent and styptic

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