Main Entry: ¹di·ag·nos·tic

Pronunciation: \-ˈnäs-tik\

Variant(s): also di·ag·nos·ti·cal \-ti-kəl\

Function: adjective

Date: 1625

1 a : of, relating to, or used in diagnosis <a diagnostic tool> b : using the methods of or yielding a diagnosis <diagnostic tests>
2 : serving to distinguish or identify <a diagnostic feature>

— di·ag·nos·ti·cal·ly \-ti-k(ə-)lē\ adverb