acetyl

noun

ace·​tyl ə-ˈsē-tᵊl How to pronounce acetyl (audio) ˈa-sə- How to pronounce acetyl (audio)
ˈa-sə-ˌtēl
: the radical CH3CO− of acetic acid
—often used in combination

Examples of acetyl in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Procapil brings biotinoyl tripeptide-1 together with botanical ingredients that help fortify follicles and anchor hair at the root, while Capixyl combines acetyl tetrapeptide-3 with red clover extract for stronger, denser-looking hair. — Christa Joanna Lee, Allure, 28 Aug. 2026 Others, like acetyl-D-leucine, have similar forms that have approval. — Mike McRae 26, New Atlas, 26 Aug. 2026 The peptide complex includes acetyl hexapeptide-8, which is often referred to as botox in a jar for its plumping, evening effect. — Essence Wiley, InStyle, 24 June 2026 The regimen included omega-3s; the antioxidant N-acetyl cysteine, commonly referred to as NAC; creatine, an amino acid supplement often used in athletic training; curcumin, an anti-inflammatory supplement derived from the turmeric plant, and more. — Ryan Coleman, Entertainment Weekly, 26 Jan. 2026 See All Example Sentences for acetyl

Word History

Etymology

borrowed from German Acetyl, from Latin acētum "vinegar" + German -yl -yl — more at acetic acid

First Known Use

1864, in the meaning defined above

Time Traveler
The first known use of acetyl was in 1864

Phrases Containing acetyl

Rhymes for acetyl

See All Rhymes for acetyl

Browse Nearby Words

aceturic acid
acetyl
acetylacetonate
See all Nearby Words

Cite this Entry

“Acetyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acetyl. Accessed 1 Sep. 2026.

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Medical Definition

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