\Bris"tol\, n.
A seaport city in the west of England.
{Bristol board}, a kind of fine pasteboard, made with a
   smooth but usually unglazed surface.
{Bristol brick}, a brick of siliceous matter used for
   polishing cultery; -- originally manufactured at Bristol.
{Bristol stone}, rock crystal, or brilliant crystals of
   quartz, found in the mountain limestone near Bristol, and
   used in making ornaments, vases, etc. When polished, it is
   called {Bristol diamond}.