pebble

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A small stone, especially one worn smooth by erosion.
2. n. Clear colorless quartz; rock crystal.
3. n. A lens made of such quartz.
4. n. Geology A rock fragment between 4 and 64 millimeters (0.16 and 2.51 inches) in diameter, especially one that has been naturally rounded.
5. n. An irregularly rough, grainy surface, as on leather or paper.
6. v. To pave with pebbles.
7. v. To impart an irregularly rough, grainy surface to (leather or paper).
8. v. To pelt with pebbles.

Century Dictionary and Cyclopedia

1. n. A small rounded stone. The term is usually applied to stones worn and rounded by the action of water. Pebbles are less in size than cobbles; and ordinary gravels are chiefly made up of sand, the grains of which pass by imperceptible gradations of size into pebbles, with which are frequently intermixed more or less of rounded fragments large enough to be called cobbles.
2. n. In jewelry, an agate. Scotch agates are commonly known as Scotch pebbles.
3. n. A transparent and colorless rook-crystal used as a substitute for glass in spectacles, or a fine kind of glass so used.
4. n. Pebble-leather.
5. n. A large size of gunpowder; pebble-powder.
6. n. One of several different pyralid, tortricid, and bombycid moths: an English collectors’ name. The garden pebble is Botys forficalis; the checkered pebble, Teras contaminana. The bombycid pebbles of the genus Notodonta are also called prominents and toothbacks.
7. To assume a prominent grain, or a rough or ribbed appearance, as leather when treated by the process called pebbling.
8. To prepare, as leather, so as to cause the grain to become prominent and to present a roughened or ribbed appearance. See pebbling.
9. n. In Australia, a hard, obstinate person; a tough; also said of animals.

Wiktionary

1. n. A small stone
2. n. geology A particle from 4 to 64 mm in diameter, following the Wentworth scale
3. n. curling A small droplet of water intentionally sprayed on the ice that cause irregularities on the surface.
4. v. To pave with pebbles.
5. v. curling To deposit water droplets on the ice. e.g. to pebble the ice between games.

GNU Webster's 1913

1. n. A small roundish piece of stone; especially, a stone worn and rounded by the action of water; a pebblestone.
2. n. Transparent and colorless rock crystal.
3. v. To grain (leather) so as to produce a surface covered with small rounded prominences.

WordNet 3.0

1. n. a small smooth rounded rock