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English definition of “diagnostic”

diagnostic

adjective     /ˌdaɪəɡˈnɒstɪk/
IT, PRODUCTION used for discovering the characteristics or cause of a problem in a system or machine: Service and support on the website give users direct access to the same diagnostic tools used by the company's technicians. diagnostic equipment
used for discovering the type or cause of an illness or other problem: John is an executive with a company that schedules and manages MRIs and other diagnostic tests. diagnostic information/questions/criteria
(Definition of diagnostic adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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