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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

test·er1

Audio Help [tes-ter] Pronunciation Key

–noun

a person or thing that tests.

[Origin: 1655–65; test¹ + -er¹

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
Tester

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tes·ter2

Audio Help [tes-ter, tees-] Pronunciation Key

–noun

a canopy, as over a bed or altar.

[Origin: 1350–1400; ME < ML testrum canopy of a bed; akin to L testa covering. See test²

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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tes·ter3

Audio Help [tes-ter] Pronunciation Key

–noun

the teston of Henry VIII.

[Origin: 1540–50; earlier testorn, var. of teston, with -r- from MF testart teston

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

American Heritage Dictionary - Cite This Source - Share This

test·er¹ Audio Help (těs'tər) Pronunciation Key
n. One that tests: a battery tester; a taste tester.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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tes·ter² Audio Help (těs'tər, tē'stər) Pronunciation Key
n. A canopy, as over a bed or pulpit.

[Middle English, from Medieval Latin testrum, from Late Latin testa, skull, from Latin, shell.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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tes·ter³ Audio Help (těs'tər) Pronunciation Key
n. See teston.

[Alteration of teston.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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tes·ton Audio Help (těs'tŏn') Pronunciation Key
n.

A 16th-century French silver coin.
An English coin stamped with the image of Henry VIII's head. In this sense, also called tester³.

[French, from Italian testone, augmentative of testa, head, from Late Latin, skull, from Latin, shell.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
tester (1)

"one who tests," 1661, from test.

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tester (2)

"canopy over a bed," c.1380, from M.L. testerium, from testera "head stall," from L.L. testa (capitis) "skull," from L., lit. "earthenware, pot." The "head" sense (originally merely humorous) is the source of tester in obs. senses of "piece of armor for the head" (c.1386) and "coin of Henry VIII" (1546), the first Eng. coin to bear a true portrait. For sense development, cf. O.E. cuppe "cup" from source of Ger. kopf "head."

WordNet - Cite This Source - Share This

tester
noun
1.	someone who administers a test to determine your qualifications [syn: examiner]
2.	a flat canopy (especially one over a four-poster bed)

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Tester

Test\, n. [OE. test test, or cupel, potsherd, F. t[^e]t, from L. testum an earthen vessel; akin to testa a piece of burned clay, an earthen pot, a potsherd, perhaps for tersta, and akin to torrere to patch, terra earth (cf. Thirst, and Terrace), but cf. Zend tasta cup. Cf. Test a shell, Testaceous, Tester a covering, a coin, Testy, T[^e]te-[`a]-t[^e]te.]

1. (Metal.) A cupel or cupelling hearth in which precious metals are melted for trial and refinement.

Our ingots, tests, and many mo. --Chaucer.

2. Examination or trial by the cupel; hence, any critical examination or decisive trial; as, to put a man's assertions to a test. "Bring me to the test." --Shak.

3. Means of trial; as, absence is a test of love.

Each test every light her muse will bear. --Dryden.

4. That with which anything is compared for proof of its genuineness; a touchstone; a standard.

Life, force, and beauty must to all impart, At once the source, and end, and test of art. --Pope.

5. Discriminative characteristic; standard of judgment; ground of admission or exclusion.

Our test excludes your tribe from benefit. --Dryden.

6. Judgment; distinction; discrimination.

Who would excel, when few can make a test Betwixt indifferent writing and the best? --Dryden.

7. (Chem.) A reaction employed to recognize or distinguish any particular substance or constituent of a compound, as the production of some characteristic precipitate; also, the reagent employed to produce such reaction; thus, the ordinary test for sulphuric acid is the production of a white insoluble precipitate of barium sulphate by means of some soluble barium salt.

Test act (Eng. Law), an act of the English Parliament prescribing a form of oath and declaration against transubstantiation, which all officers, civil and military, were formerly obliged to take within six months after their admission to office. They were obliged also to receive the sacrament according to the usage of the Church of England. --Blackstone.

Test object (Optics), an object which tests the power or quality of a microscope or telescope, by requiring a certain degree of excellence in the instrument to determine its existence or its peculiar texture or markings.

Test paper. (a) (Chem.) Paper prepared for use in testing for certain substances by being saturated with a reagent which changes color in some specific way when acted upon by those substances; thus, litmus paper is turned red by acids, and blue by alkalies, turmeric paper is turned brown by alkalies, etc. (b) (Law) An instrument admitted as a standard or comparison of handwriting in those jurisdictions in which comparison of hands is permitted as a mode of proving handwriting.

Test tube. (Chem.) (a) A simple tube of thin glass, closed at one end, for heating solutions and for performing ordinary reactions. (b) A graduated tube.

Syn: Criterion; standard; experience; proof; experiment; trial.

Usage: Test, Trial. Trial is the wider term; test is a searching and decisive trial. It is derived from the Latin testa (earthen pot), which term was early applied to the fining pot, or crucible, in which metals are melted for trial and refinement. Hence the peculiar force of the word, as indicating a trial or criterion of the most decisive kind.

I leave him to your gracious acceptance, whose trial shall better publish his commediation. --Shak.

Thy virtue, prince, has stood the test of fortune, Like purest gold, that tortured in the furnace, Comes out more bright, and brings forth all its weight. --Addison.

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