activated carbon

noun

: a highly adsorbent powdered or granular carbon made usually by carbonization and chemical activation and used chiefly for purifying by adsorption

called also activated charcoal

Examples of activated carbon in a Sentence

Recent Examples on the Web
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Some air purifiers for pets also have activated carbon filters to reduce odors. Samantha Jones Updated, Better Homes & Gardens, 4 May 2023 Other filtration technologies are harder to evaluate, including those that incorporate activated carbon and ultraviolet light. Rachel Rothman, Good Housekeeping, 21 June 2022 The Blueair Blue Pure 211+ air purifier ($299 at Home Depot) has activated carbon pellets incorporated into the pleated filter. oregonlive, 14 May 2021 These Kinglight activated carbon filters are made from cotton and non-woven material. NBC News, 15 Aug. 2020

Word History

First Known Use

1921, in the meaning defined above

Time Traveler
The first known use of activated carbon was in 1921

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Cite this Entry

“Activated carbon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/activated%20carbon. Accessed 1 Jul. 2026.

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