Tympan,
n. [F., fr. L.
tympanum a kettledrum, a panel of a door. See
Tympanum, and cf.
Tymp.].
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A drum. [1913 Webster]
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A panel; a tympanum. [1913 Webster]
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A frame covered with parchment or cloth, on which the blank sheets are put, in order to be laid on the form to be impressed. [1913 Webster]
Tympan sheet (Print.), a sheet of paper of the same size as that to be printed, pasted on the tympan, and serving as a guide in laying the sheets evenly for printing. W. Savage.