[adjective] concerned with diagnosis; used for furthering diagnosis; "a diagnostic clinic"; "a diagnostic reading test"; "diagnostic information"
[adjective] characteristic or indicative of e.g. a disease; "a diagnostic sign of yellow fever"; "diagnostic information"; "a rash symptomatic of scarlet fever"; "symptomatic of insanity"; "a rise in crime symptomatic of social breakdown" Synonyms:symptomatic, symptomatic of