d īˈagnose (or /-nōzˈ, or (esp N American) -nōs or -nōsˈ/) transitive verb

To identify (a disease or other problem) from symptoms

diagnosˈtic adjective

1. Of, or useful in, diagnosis
2. Distinguishing
3. Differentiating

1. That by which anything is known
2. A symptom
3. A diagnostic program or routine (computing)

diagnostiˈcian /-nos-tishˈən/ noun

A person skilled in diagnosis

diagnosˈtics singular noun

Diagnosis as a branch of medicine

diagnostic characters plural noun (zoology)

Characteristics by which one genus, species, family or group can be differentiated from another

diagnostic program or diagnostic routine noun

A program or routine used in most computers as an aid in the debugging of programs and systems