What is the meaning of Diagnostic?

Of, or relating to diagnosis.

Characteristic of a particular disease.

Serving to indicate or specify a particular item or thing within a group of similar things.

Intended to assess a student's preexisting knowledge on the material being taught.

(of a skeletal or genetic feature) Characteristic of a particular taxon or clade.

Any technique used in medical diagnosis.

Any tool or technique used to find the root of a problem.

That by which anything is known; a symptom.

diagnosis

diagnostic

Source: wiktionary.org