"to ascertain or determine (a disease) from its symptoms," 1861, back-formation from diagnosis (q.v.) on the model of metamorphose, etc. Earlier was diagnosticate (by 1834). Related: Diagnosed; diagnosing.
Entries linking to diagnose
diagnosis n.
"scientific discrimination," especially in pathology, "the recognition of a disease from its symptoms," 1680s, medical Latin application of Greek diagnōsis "a discerning, distinguishing," from stem of diagignōskein "discern, distinguish," literally "to know thoroughly" or "know apart (from another)," from dia "between" (see dia-) + gignōskein "to learn, to come to know," from PIE root *gno- "to know."
misdiagnose v.
"make a wrong diagnosis," 1897, from mis- (1) "badly, wrongly" + diagnose. Related: Misdiagnosed; misdiagnosing.