tympan
noun
- Obsolete a drum
- the paper, cardboard, etc. stretched over the platen or impression cylinder of a printing press to cushion the paper being printed and equalize type pressure
- any membranelike part
- Archit. tympanum
See tympan in American Heritage Dictionary 4
(tĭmˈpən)
noun- Printing A padding, as of paper or cloth, placed over the platen of a press to regulate the pressure on the sheet being printed.
- Architecture A tympanum.
- A tightly stretched sheet or membrane, as on the head of a drum.
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