1620s, "act of rebounding or springing back," often of immaterial things, from Latin resiliens, present participle of resilire "to rebound, recoil," from re- "back" (see re-) + salire "to jump, leap" (see salient (adj.)). Compare result (v.). In physical sciences, the meaning "elasticity, power of returning to original shape after compression, etc." is by 1824.
