a.

1. 诊断的；特征的

n.

1. 诊断结论

adj.

1. concerned with the diagnosis of illness or other problems.
   ▸(of a symptom) distinctive, and so indicating the nature of an illness.
2. characteristic of a particular species, genus, or phenomenon.

n.

1. a distinctive symptom or characteristic.
2. (diagnostics) [treated as sing. or pl.] the practice or techniques of diagnosis.
3. Computing  a program or routine that helps a user to identify errors.