/duy'euhg nos"tik/, adj.
1. of, pertaining to, or used in diagnosis.
2. serving to identify or characterize; being a precise indication.
3. diagnosis (def. 1).
4. a symptom or characteristic of value in diagnosis.
5. Med. a device or substance used for the analysis or detection of diseases or other medical conditions.
6. Computers.
a. a message output by a computer diagnosing an error in a computer program, computer system, or component device.
b. a program or subroutine that produces such messages.
[1615-25; < Gk diagnostikós, equiv. to diagnost(ós) distinguished (akin to diágnosis; see DIAGNOSIS) + -ikos -IC]

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Universalium. 2010.