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Definition of diagnostic adjective from the Oxford Advanced Learner's Dictionary

diagnostic

adjective
 
/ˌdaɪəɡˈnɒstɪk/
 
/ˌdaɪəɡˈnɑːstɪk/
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  1. [usually before noun] (specialist) connected with identifying an illness or other problem
    • to carry out diagnostic assessments/tests
    • Get a low-cost car diagnostic tool to identify the fault.
    • diagnostic of something specific conditions which are diagnostic of AIDS
    Topics Healthcarec2
    Oxford Collocations DictionaryDiagnostic is used with these nouns:
    • manual
    • procedure
    • technique
    See full entry
  2. connected with identifying what a student needs to learn
    • diagnostic grammar tests
  3. Word Originearly 17th cent.: from Greek diagnōstikos ‘able to distinguish’, from diagignōskein ‘distinguish’; the noun from hē diagnōstikē tekhnē ‘the art of distinguishing (disease)’.
See diagnostic in the Oxford Advanced American DictionarySee diagnostic in the Oxford Learner's Dictionary of Academic English

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