Clapper
WordNet
noun
(1) Metal striker that hangs inside a bell and makes a sound by hitting the side
(2) A mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity
(3) Someone who applauds
WiktionaryText
Noun
- An object so suspended inside a bell that it may hit the bell and cause it to ring.
- A wooden mechanical device used as a scarecrow; bird-scaring rattle, a wind-rattle or a wind-clapper.