Pĕb'ble, n.

n. [A-S. pabol, papolstān, popolstān. Cf. Icel. pōpǫll, a ball.]

1. A small, roundish stone; a stone worn and rounded by the action of water; a small bowlder. “The murmuring surge that on the unnumbered pebbles chafe.” Shak. “As children gathering pebbles on the shore.” Milton.
2. Transparent and colorless rock-crystal;—so called by opticians. Brande.