materjali plastsusnäitaja; tõmbeteimiku suhteline ristlõikepindala muut purunemiskohas tõmbeteimil (vt ahenemine; vrd katkeahenemine/protsentuaalne ahenemine), the difference between the original cross-sectional area and the smallest area at the point of fracture of a tensile specimen (see: cross-section reduction; compare: percent reduction of area)