Tympan
TYM'PAN, noun [Latin tympanum. See Tymbal.]
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.