EVOLUTE • DICCIONARIO INGLES.COM • Definition of Evolute

... simplicity, a pattern much favored in modern adaptation. Another stoop of this type at Number 272 South American Street is high enough to permit a basement entrance beneath the platform. The ironwork is beautifully hand-wrought in the Florentine manner, its elaborate scroll pattern beneath an evolute spiral band combining round ball spindles with flat bent fillets, and the curved newel treatment at each side adding materially to the grace ...

— The Colonial Architecture of Philadelphia • Frank Cousins