Webster's Revised Unabridged Dictionary · 1913

Pebble

Pebble , noun

[Anglo-Saxon papolstān; compare Latin papula pimple, mote. See Stone.]

1.
A small roundish piece of stone; especially, a stone worn and rounded by the action of water; a pebblestone.
The pebbles on the hungry beach. — Shakespeare
As children gathering pebbles on the shore. — Milton
2.
Transparent and colorless rock crystal; as, Brazilian pebble; -- so called by opticians.
Collocations (2)
Pebble powder , slow-burning gunpowder, in large cubical grains.
Scotch pebble , varieties of quartz, as agate, chalcedony, etc., obtained from cavities in amygdaloid.

Pebble , transitive verb

To grain (leather) so as to produce a surface covered with small rounded prominences.