tympan

1. A piece of cloth padding placed under the platen of a letterpress to distribute the pressure on the sheet being printed.

2. The stretched membrane of a drum.

   a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end

3. A percussion instrument consisting of a hollow cylinder with such a membrane at each end.

4. A tympanum.

5. The tympanum of the ear.

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