pebble
/ˈpɛb.əl/
A small stone, especially one rounded by the action of water.
A particle from 4 to 64 mm in diameter, following the Wentworth scale.
A small droplet of water intentionally sprayed on the ice that cause irregularities on the surface.
Transparent and colourless rock crystal.
Brazilian pebble
A form of slow-burning gunpowder in large cubical grains.