Monomaniac \Mon`oma"ni*ac\, n. A person affected by monomania. Monomaniac \Mon`oma"ni*ac\, Monomaniacal \Mon`oma"ni*a*cal\, a. [Cf. F. monomaniaque.] Affected with monomania, or partial derangement of intellect; caused by, or resulting from, monomania; as, a monomaniacal delusion.
monomaniac n : a person suffering from monomania