S: (n) fold, crease, plication, flexure, crimp, bend (an angular or rounded shape made by folding) "a fold in the napkin"; "a crease in his trousers"; "a plication on her blouse"; "a flexure of the colon"; "a bend of his elbow"
S: (n) flexion, flexure (act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased)