rock dust


Definition of rock dust

 (Entry 1 of 2)

: pulverulent rock (as shale or limestone) used in rock-dusting

called also stone dust


transitive verb

Definition of rock-dust (Entry 2 of 2)

: to spread or distribute rock dust in (coal mine workings) to reduce the explosion hazard

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History and Etymology for rock dust

Transitive verb

rock dust

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Cite this Entry

“Rock dust.” The Dictionary, Merriam-Webster Inc., Accessed 9 December 2019.

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