monomaniac

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

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