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acetic acid
noun
ace·tic acid
ə-ˈsē-tik-
: 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
Supports Balanced Blood Sugar Levels The fermentation process used to make sourdough produces organic acids, such as lactic and acetic acids, which help slow the absorption of starch in the digestive tract.
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Jillian Kubala, Health, 28 Jan. 2025
The cider then undergoes a second round of fermentation, during which acetic acid bacteria convert the ethanol to acid, giving the vinegar its signature tangy flavor.
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Annie Peterson, Better Homes & Gardens, 17 Jan. 2025
The acetic acid in apple cider vinegar is an ingredient in products used to treat seborrheic keratosis—noncancerous brown or black spots.
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Mark Gurarie, Verywell Health, 2 Oct. 2024
Celanese Celanese, based in Irving, Texas, is a chemical company producing acetic acid and polymers.
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John Dorfman, Forbes, 16 Dec. 2024
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Word History
Etymology
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
First Known Use
1788, in the meaning defined above
Dictionary Entries Near acetic acid
Cite this Entry
“Acetic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acetic%20acid. Accessed 7 Feb. 2025.
Kids Definition
acetic acid
noun
: a colorless strong-smelling liquid acid that gives the sour taste to vinegar and that is used especially in making chemical compounds (as plastics)
Medical Definition
acetic acid
noun
: 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
More from Merriam-Webster on acetic acid
Britannica.com: Encyclopedia article about acetic acid
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