[F., fr. L. tympanum
a kettledrum, a panel of a door. See Tympanum
, and cf. Tymp
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.
A drum. [1913 Webster]
A panel; a tympanum. [1913 Webster]
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]