fly ash

noun

Definition of fly ash

: fine solid particles of ashes, dust, and soot carried out from burning fuel (such as coal or oil) by the draft

Examples of fly ash in a Sentence

Recent Examples on the Web Iron flecks in coal fly ash, for example, are amorphous globs that dissolve more easily than the crystals found in mineral dust. Emily Underwood, Smithsonian Magazine, "The Complicated Role of Iron in Ocean Health and Climate Change," 3 Jan. 2020 Iron flecks in coal fly ash, for example, are amorphous globs that dissolve more easily than the crystals found in mineral dust. Emily Underwood, Smithsonian Magazine, "The Complicated Role of Iron in Ocean Health and Climate Change," 3 Jan. 2020 Iron flecks in coal fly ash, for example, are amorphous globs that dissolve more easily than the crystals found in mineral dust. Emily Underwood, Smithsonian Magazine, "The Complicated Role of Iron in Ocean Health and Climate Change," 3 Jan. 2020 Lunar regolith has chemical similarities to fly ash, which makes geopolymers an attractive option for building stuff on the moon. Daniel Oberhaus, Wired, "On the Moon, Astronaut Pee Will Be a Hot Commodity," 22 May 2020 Rice husk ash is more elastic and may be feasible in higher percentages than fly ash. Caroline Delbert, Popular Mechanics, "New Kind of Concrete Cracks Much Less Than the Regular Stuff," 4 Nov. 2019 Iron flecks in coal fly ash, for example, are amorphous globs that dissolve more easily than the crystals found in mineral dust. Emily Underwood, Smithsonian Magazine, "The Complicated Role of Iron in Ocean Health and Climate Change," 6 Jan. 2020 Ron Bledsoe, a truck driver who now struggles to breathe with chronic obstructive pulmonary disease, said supervisors made a big deal about safety glasses and steel-toed boots but downplayed the fly ash swirling around them. Washington Post, "Sick and dying workers demand help after cleaning coal ash," 28 Aug. 2019 Concrete and coal fly ash aren't typically grouped together, but the both represent severe environmental problems. David Grossman, Popular Mechanics, "Scientists Make Concrete With Trash Instead of Cement," 12 July 2018

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

1931, in the meaning defined above

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The first known use of fly ash was in 1931

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Last Updated

16 Sep 2020

Cite this Entry

“Fly ash.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fly%20ash. Accessed 24 Sep. 2020.

More from Merriam-Webster on fly ash

Britannica.com: Encyclopedia article about fly ash

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