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|Noun||1.||crushed rock - rock fragments and pebbles |
rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"
ballast - coarse gravel laid to form a bed for streets and railroads
shingle - coarse beach gravel of small waterworn stones and pebbles (or a stretch of shore covered with such gravel)
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.