Definify.com
Webster 1913 Edition
Tympan
1.
A drum.
[Obs.]
2.
(Arch.)
A panel; a tympanum.
3.
(Print.)
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.
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.
Webster 1828 Edition
Tympan
TYM'PAN
,Noun.
1.
A drum; hence, the barrel or hollow part of the ear behind the membrane of the tympanum.2.
The area of a pediment; also, the part of a pedestal called the trunk or dye.3.
The pannel of a door.4.
A triangular space or table in the corners or sides of an arch, usually enriched with figures.5.
Among printers, 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.