diagnostics

/D AY0 AH0 G N AA1 S T IH0 K S/
noun
  1. 1

    Any technique used in medical diagnosis.

  2. 2

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

  3. 3

    That by which anything is known; a symptom.

Source: https://en.wiktionary.org/wiki/diagnostic, https://en.wiktionary.org/wiki/diagnostics