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From Longman Dictionary of Contemporary English
Related topics: Hair & beauty
testertest‧er /ˈtestə $ -ər/ noun [countable]  1 a person or piece of equipment that tests something2 DCBa small bottle of perfume1(1) etc, in a shop, for customers to try
Examples from the Corpus
testerBut Legacy was more of a stopgap than a serious WordStar product, a tester, you might say.The earliest crash testers were human volunteers.That's why we're going to ask you to be our testers.Our tester found it very effective.Our tester had just one option, leather seat upholstery, for $ 550.We watch commercials for pregnancy testers that warn women to remember their biological clocks.
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