Cobble

(20), n. [From cob, 3. Also called cobstone. Cf. COPPLE, COPPLE-STONE.] A rounded fragment, as of stone, coal, &c.; a large pebble; a cob; as, a pavement of cobble-stones.

Their hands shook swords, their slings held cobbles round. Fairfax.

n. A lump or fragment of stone rounded by the action of water. See COBBLE-STONE.