D defs.my
Entry 2 senses Webster, 1913

Elasticity

/(ē`lăs*tĭs"ĭ*ty̆)/ · E·las·tic·i·ty · IPA /ɪ.læsˈtɪs.ɪ.ti/
01 n. The quality of being elastic; the inherent property in bodies by which they recover their former figure or dimensions, after the removal of…
  1. 1.
    The quality of being elastic; the inherent property in bodies by which they recover their former figure or dimensions, after the removal of external pressure or altering force; springiness; resilience; tendency to rebound; as, the elasticity of caoutchouc; the elasticity of the air.
  2. 2.
    Power of resistance to, or recovery from, depression or overwork; -- usually referred to as resilience[3]. Also: resilience
Phrases & compounds
Coefficient of elasticity — the quotient of a stress (of a given kind), by the strain (of a given kind) which it produces; -- called also coefficient of resistance.
Surface of elasticity — the pedal surface of an ellipsoid (see Pedal); a surface used in explaining the phenomena of double refraction and their relation to the elastic force of the luminous ether in crystalline media.