葱花線繰形

thumb|right|Two ogee curve examples with their extended S shapes, concave over convex (cyma recta), and convex over concave (cyma reversa), representing the cross section (geometry)|cross-sections of two types of decorative moldings used in building An ogee ( ) is an object, element, or curve—often seen in architecture and building trades—that has a serpentine or extended S shape (sigmoid). Ogees consist of a double curve, the combination of two curves that, as a result of a point of inflection from concave to convex or vice versa, have ends of the overall curve that point in opposite directio