Tester

Part of speech: noun (n.)

1. A headpiece; a helmet. [Obs.] The shields bright, testers, and trappures. Chaucer.

2. A flat canopy, as over a pulpit or tomb. Oxf. Gross.

3. A canopy over a bed, supported by the bedposts. No testers to the bed, and the saddles and portmanteaus heaped on me to keep off the cold. Walpole.

Part of speech: noun (n.)

An old French silver coin, originally of the value of about eighteen pence, subsequently reduced to ninepence, and later to sixpence, sterling. Hence, in modern English slang, a sixpence; -- often contracted to tizzy. Called also teston. Shak.