jõu mõjul tekkiva nurgamuutus keha punkti läbiva kahe algselt teineteisega risti oleva sirge vahel (vt moone, tangentsiaalpinge; vrd normaalmoone, mahumoone), the angular change, due to force, between two lines originally perpendicular to each other through a point of body (see: strain, tangential stress; compare: normal strain, volumetric strain)