flexure

(noun) the state of being flexed (as of a joint). Synonyms: flection, flexion.

(noun) an angular or rounded shape made by folding. Synonyms: fold, crease, plication, crimp, bend. Examples: "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."

(noun) act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased. Synonyms: flexion.