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English definition of “double-blind”

double-blind

adjective     /ˌdʌb.əlˈblaɪnd/ US  /ˈdʌb.əlˈblɑɪnd/ specialized
a double-blind test is one, usually for a drug treatment, in which neither the subject nor the tester knows which treatment is given: a double-blind trialTesting, checking and experimenting
(Definition of double-blind adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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