Rectangularity and Flexure

noun

• The property of being shaped like a rectangle.
  • synonyms: oblongness

noun

• The state of being flexed (as of a joint.
  • synonyms: flection, flexion
• An angular or rounded shape made by folding.
  • usage: "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"
  • synonyms: fold, crease, plication, crimp, bend
• Act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased.
  • synonyms: flexion

• (n.) The act of flexing or bending; a turning or curving; flexion; hence, obsequious bowing or bending.
• (n.) A turn; a bend; a fold; a curve.
• (n.) The small distortion of an astronomical instrument caused by the weight of its parts; the amount to be added or substracted from the observed readings of the instrument to correct them for this distortion.
• (n.) The last joint or bend, of the wing of a bird.