sleigh bell

from The Century Dictionary.

• noun A bell, commonly consisting of a hollow ball of metal having a slit or oblong hole in the exterior, and containing a solid pellet of metal which causes a ringing sound when the ball is agitated. Compare grelot and hawk-bell.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a bell attached to a sleigh, or to the harness of a horse that is pulling a sleigh