The Collaborative International Dictionary of English v.0.48:

Palsy \Pal"sy\, n.; pl. Palsies. [OE. palesie, parlesy, OF.
   paralesie, F. paralysie, L. paralysis. See Paralysis.]
   (Med.)
   Paralysis, complete or partial. See Paralysis. "One sick of
   the palsy." --Mark ii. 3.
   [1913 Webster]

   Bell's palsy, paralysis of the facial nerve, producing
      distortion of one side of the face; -- so called from Sir
      Charles Bell, an English surgeon who described it.

   Scrivener's palsy. See Writer's cramp, under Writer.

   Shaking palsy, (Med.) paralysis agitans, a disease usually
      occurring in old people, characterized by muscular tremors
      and a peculiar shaking and tottering gait; now called
      parkinsonism, or Parkinson's disease.
      [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

shaking palsy
    n 1: a degenerative disorder of the central nervous system
         characterized by tremor and impaired muscular coordination
         [syn: paralysis agitans, Parkinsonism, Parkinson's
         disease, Parkinson's syndrome, Parkinson's, shaking
         palsy]