tester

from The Century Dictionary.

• noun One who tests, tries, assays, or proves.
• noun Any instrument or apparatus used in testing: as, a steam-gage tester; a vacuum-tester.
• noun A name given to the shillings coined by Henry VIII., and to sixpences later (compare teston); also, in modern slang, a sixpence.
• noun A canopy.
• noun Specifically— The frame which connects the tops of the posts in a four-post bedstead, and the material stretched upon it, the whole forming a sort of canopy.
• noun In architecture, a flat canopy, as over a pulpit or a tomb.
• noun A head-piece; a helmet.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.
• noun obsolete A headpiece; a helmet.
• noun A flat canopy, as over a pulpit or tomb.
• noun A canopy over a bed, supported by the bedposts.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A canopy over a bed etc.
• noun An old French silver coin.
• noun UK, slang, dated A sixpence.
• noun A person who administers a test.
• noun A device used for testing.
• noun A sample of perfume available in a shop for customers to try before they buy.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun someone who administers a test to determine your qualifications
• noun a flat canopy (especially one over a four-poster bed)