Rubble

rub′l, n. the upper fragmentary decomposed matter of a ma of rock: water-worn stones: small, undre ed stones used in coarse masonry.— ns. Rubb′le-stone (same as Rubble ): also ( geol. ) a kind of conglomerate rock; Rubb′le-work , a coarse kind of masonry of stones left almost as they come from the quarry, or only dre ed a little with the hammer.— adj. Rubb′ly . [O. Fr. robel , pl. robeux , dim. of robe , rob be , rubbish ; cf. It. rob a , and the cognate rob .]