Drumhead /(?)/

Drum·head

Drumhead

n.
  1. The parchment or skin stretched over one end of a drum.
  2. The top of a capstan which is pierced with sockets for levers used in turning it. See Illust. of Capstan.

Phrases & Compounds
Drumhead court-martial
a summary court-martial called to try offenses on the battlefield or the line of march, when, sometimes, a drumhead has to do service as a writing table.