- Medicine.
- The act or process of identifying or determining the nature and cause of a disease or injury through evaluation of patient history, examination, and review of laboratory data.
- The opinion derived from such an evaluation.
- A critical analysis of the nature of something.
- The conclusion reached by such analysis.
- Biology. A brief description of the distinguishing characteristics of an organism, as for taxonomic classification.
[Greek diagnōsis, discernment, from diagignōskein, to distinguish : dia-, apart; see dia- + gignōskein, gnō-, to come to know, discern.]






