noun a curve formed by a flexible chain or string hanging freely from two points and forming a U shape
adjective relating to or resembling a catenary
noun a regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points (the foci) is constant, or resulting when a cone is cut by an oblique plane that does not intersect the base
noun a spiral or scroll-shaped ornament, especially on a capital in architecture