[1] : The Collaborative International Dictionary of English v.0.48

tester \tes"ter\, n. for testern, teston, fr. f. teston, fr.
   of. teste the head, the head of the king being impressed upon
   the coin. see tester a covering, and cf. testone,
   testoon.
   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.
   1913 webster
see also:
tester testone testoon tizzy teston 

[2] : The Collaborative International Dictionary of English v.0.48

tester \tes"ter\, n. oe. testere a headpiece, helmet, of.
   testiere, f. t^eti`ere a head covering, fr. of. teste the
   head, f. t^ete, fr. l. testa an earthen pot, the skull. see
   test a cupel, and cf. testi`ere.
   1. a headpiece; a helmet. obs.
      1913 webster

            the shields bright, testers, and trappures.
                                                  --chaucer.
      1913 webster

   2. a flat canopy, as over a pulpit or tomb. --oxf. gross.
      1913 webster

   3. a canopy over a bed, supported by the bedposts.
      1913 webster

            no testers to the bed, and the saddles and
            portmanteaus heaped on me to keep off the cold.
                                                  --walpole.
      1913 webster
see also:
test testi`ere 

[3] : WordNet (r) 2.0

tester
     n 1: someone who administers a test to determine your
          qualifications syn: examiner, quizzer
     2: a flat canopy especially one over a four-poster bed
see also:
examiner quizzer 

[4] : Moby Thesaurus II by Grady Ward, 1.0

18 moby thesaurus words for "tester":
   analyst, analyzer, assayer, essayer, examinant, examiner,
   experimenter, inspector, investigator, observer, research worker,
   researcher, scrutineer, test driver, test pilot, tryer-out,
   visitator, visitor

Tester >> T Words
Tester, definition of term: Tester
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