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

The kitchen countertops are Squak Mountain Stone, a material made of cement, fly ash, glass dust and paper. Julie Lasky, New York Times, "$450,000 Homes in Massachusetts, Oklahoma and Wisconsin," 1 Nov. 2017 There was danger in the fly ash, or the powderlike particles produced when burning coal, dirtying the air. Sarah Bowman, Indianapolis Star, "These toxic coal pits are leaking into Indiana’s water," 24 Sep. 2017

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.

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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