Source : Webster's Revised Unabridged Dictionary (1913)

Hemiplegia \Hem`i*ple"gi*a\, n.[NL., fr. Gr. ?; ? half + ? a
   stroke; cf. F. h['e]miplagie.] (Med.)
   A palsy that affects one side only of the body. --
   {Hem`i"pleg"ic}, a.

Source : WordNet®

hemiplegia
     n : paralysis of one side of the body [syn: {unilateral
         paralysis}]