[′kȯrs ′ag·rə·gət] (materials) Crushed stone or gravel used in concrete; will not, when dry, pass through a sieve with ¼-inch-diameter (6-millimeter) holes.
coarse aggregate
Aggregate retained on a 4.76-mm (No. 4) sieve. Also see crushed gravel, crushed stone, gravel, pea gravel.