Source : Webster's Revised Unabridged Dictionary (1913)

Paraplegia \Par`a*ple"gi*a\, Paraplegy \Par"a*ple`gy\, n. [NL.
   paraplegia, fr. Gr. ? hemiplegia, fr. ? to strike at the
   side; ? beside + ? to strike: cf. F. parapl['e]gie.] (Med.)
   Palsy of the lower half of the body on both sides, caused
   usually by disease of the spinal cord. -- {Par`a*pleg"ic}, a.

Source : WordNet®

paraplegic
     adj : suffering complete paralysis of the lower half of the body
           usually resulting from damage to the spinal cord
     n : a person who has paraplegia (is paralyzed from the waist
         down)