1753, from Latin spasticus, from Greek spastikos "afflicted with spasms," literally "drawing, pulling," from span "draw up" (see spasm). The noun meaning "a person affected with spastic paralysis" is attested from 1896.
spasticity spas·tic·i·ty (spā-stĭs'ĭ-tē)
A spastic state or condition.
spastic spas·tic (spās'tĭk)
Relating to or affected by spasm.
Relating to spastic paralysis.