PEBBLE

I. noun Etymology: Middle English pobble, from Old English papolstān, from papol- (of unknown origin) + stān stone Date: 14th century a small usually rounded stone especially when worn by the action of water, transparent and colorless quartz ; rock crystal , an irregular, crinkled, or grainy surface, pebbly adjective II. transitive verb (~d; pebbling) Date: 1605 to pelt with ~s, to pave or cover with ~s or something resembling ~s, to grain (as leather) so as to produce a rough and irregularly indented surface