noun
Technical term in physics and materials science; refers to the property of a solid material to undergo permanent deformation without breaking. Often contrasted with 弾性 (elasticity).
See also: 可塑性
金属は塑性変形を起こすことがある。
Metals can undergo plastic deformation.
塑性加工は自動車部品の製造に使われる。
Plastic working is used in the manufacture of automobile parts.
From 塑 (model, mold) + 性 (property, nature). The kanji 塑 originally refers to shaping clay or similar materials, reflecting the concept of permanent deformation.