Meaning of DIAGNOSTIC in English

DIAGNOSTIC

di ‧ ag ‧ nos ‧ tic /ˌdaɪəɡˈnɒstɪk◂ $ -ˈnɑː-/ BrE AmE adjective

relating to or used for discovering what is wrong with someone or something

diagnostic tests/tools

Doctors depend on accurate diagnostic tools.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.