1
: an acetate containing three CH3COO− groups
2
: a textile fiber or fabric consisting of cellulose that is completely or almost completely acetylated

Examples of triacetate 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.
Call a professional to treat the stain if your couch fabric contains acetate or triacetate, since solvents could damage the fabric. — Emily Benda Gaylord, The Spruce, 11 Jan. 2026 Materials like denim, mesh and triacetate were enhanced by a collaboration with Dainese, a leading motorcycle protection company. — Andrea Onate, WWD, 17 June 2024 If not stated in the product name, be sure to look for materials such as Supima cotton, triacetate and certain types of polyester. — Casey Delbasso, ABC News, 7 June 2024 Natural beauty of the human face and subtle sensations of temperature are more immediately experienced, captured and presented on the living organism that is cellulose triacetate. — Ellise Shafer, Variety, 7 Feb. 2024 How To Remove Polish From Clothing With Acetone First and foremost, see if the fabric contains acetate, triacetate, or modacrylic. — Southern Living Editors, Southern Living, 14 Nov. 2023 Cotton, linen, acetate and triacetate also have a high burning rate but this can be alleviated by the application of flame-retardant chemical additives. — oregonlive, 15 Aug. 2022

Word History

Etymology

International Scientific Vocabulary

First Known Use

1895, in the meaning defined at sense 1

Time Traveler
The first known use of triacetate was in 1895

Browse Nearby Words

Cite this Entry

“Triacetate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triacetate. Accessed 2 Oct. 2026.

Kids Definition

triacetate

noun
: a textile fiber or fabric made by the chemical addition of acetate groups to cellulose

Medical Definition

triacetate

noun
: an acetate containing three CH3COO groups
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