bullroarer 
noun Australian
A sacred object used in Aboriginal religious ceremonies, consisting of a piece of wood attached to a string, whirled round to produce a roaring noise.Another traditional instrument still used in ritual and ceremonial events is the bullroarer, a thin piece of wood suspended from a string and swung in a circle....
- Their sacred bullroarer is kept with other Tjuringas.
- Shaped like a knife, a bullroarer makes a humming noise when it is swung.
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- Field of the Cloth of Gold
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