tester

Short definition from Wiktionary

Noun

1. 1
   A canopy over a bed.
2. 2
   Something that overhangs something else; especially a canopy or soundboard over a pulpit.
3. 3
   A person who administers a test.
4. 4
   A device used for testing.
5. 5
   A punishment of 25 lashes (strokes of a whip) across a person′s back.
6. 6
   A sample of perfume available in a shop for customers to try before they buy.
7. 7
   A miniature pot of paint for testing and comparison purposes.
8. 8
   A cyclist who focuses on success in time trials.
9. 9
   An old French silver coin.
10. 10
    A sixpence.
11. 11
    Alternative form of testiere (“armor for a horse's head”).

Proper noun

1. 1
   A surname from Old French.