curved shape - the trace of a point whose direction of motion changesline - a length (straight or curved) without breadth or thickness; the trace of a moving point closed curve - a curve (such as a circle) having no endpoints S-shape - a double curve resembling the letter S catenary - the curve theoretically assumed by a perfectly flexible and inextensible cord of uniform density and cross section hanging freely from two fixed points Cupid's bow - the double curve of the upper lip when considered to resemble Cupid's bow extrados - the exterior curve of an arch gooseneck - something in a thin curved form (like the neck of a goose) intrados - the interior curve of an arch bend, turn, crook - a circular segment of a curve; "a bend in the road"; "a crook in the path" crotchet, hook - a sharp curve or crook; a shape resembling a hook envelope - a curve that is tangent to each of a family of curves arc - a continuous portion of a circle crenation, crenature, crenel, crenelle, scallop - one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) spiral - a plane curve traced by a point circling about the center but at ever-greater distances from it helix, spiral - a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle perversion - a curve that reverses the direction of something; "the tendrils of the plant exhibited perversion"; "perversion also shows up in kinky telephone cords" arch - a curved shape in the vertical plane that spans an opening arc, bow - something curved in shape crescent - any shape resembling the curved shape of the moon in its first or last quarters quadric, quadric surface - a curve or surface whose equation (in Cartesian coordinates) is of the second degree |