/ daɪəgnoʊsɪs /
ETYM New Lat., from Greek, to distinguish; dia through, asunder + gignoskein to know. Related to Know.
(Irregular plural: diagnoses).
Identifying the nature or cause of some phenomenon; SYN. diagnosing.
Determining the nature of a patient's disease or injury by consideration of signs and symptoms (elicited by examination and questioning), together with any test results, X-rays or scans, and a knowledge of the patient's medical history.