a: the art or act of identifying a disease from its signs and symptoms b: the decision reached by diagnosis <a diagnosis of pneumonia>
: a concise technical description of a taxon
Identification of a disease or disorder. Diagnosis requires a medical history (including family history), a physical examination, and usually tests and diagnostic procedures (e.g., blood analysis, diagnostic imaging). A list of possible causesthe differential diagnosisis developed and then narrowed down by further tests that eliminate or support specific possibilities.