rock dust
noun
a crushed limestone sprayed on surfaces in mines to make coal dust incombustible in case of a gas explosion.
Origin of rock dust
First recorded in 1930–35
Words nearby rock dust
rock creek butte,
rock cress,
rock crystal,
rock cycle,
rock dove,
rock dust,
rock elm,
rock falls,
rock fence,
rock fever,
rock flour
Example sentences from the Web for rock dust
The flame of the explosion can't pass through and the fire can't jump a rock-dust barrier.
The Boy With the U.S. Miners |Francis Rolt-WheelerRain and rock-dust had smeared all things alike in this gray roasting shambles.
She Buildeth Her House |Will ComfortLittle clouds of rock-dust rose above the bear, in front of him, behind him, and below him.
Tenting To-night |Mary Roberts Rinehart