"insanity in regard to a single subect or class of subjects," 1820, probably on model of earlier French monomanie, from Modern Latin monomania, from Greek monos "single, alone" (see mono-) + mania (see mania).
权威例句
1. "It is the sort of malady which we call monomania," said the doctor.
“这种病我们叫做偏执狂。”医生说道。
2. The western world was indeed black with homicidal monomania.