Meaning of DIAGNOSTIC in English

DIAGNOSTIC

/ ˌdaɪəgˈnɒstɪk; NAmE -ˈnɑːs-/ adjective , noun

■ adjective

[ usually before noun ] ( technical ) connected with identifying sth, especially an illness :

to carry out diagnostic assessments / tests

specific conditions which are diagnostic of AIDS

■ noun ( computing )

1.

(also ˌdiagˈnostic program ) [ C ] a program used for identifying a computer fault

2.

[ C ] a message on a computer screen giving information about a fault

3.

diagˈnostics [ U ] the practice or methods of diagnosis (= finding out what is wrong with a person who is ill / sick)

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WORD ORIGIN

early 17th cent.: from Greek diagnōstikos able to distinguish, from diagignōskein distinguish; the noun from hē diagnōstikē tekhnē the art of distinguishing (disease).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.