Source : Webster's Revised Unabridged Dictionary (1913)

Eclampsia \Ec*lamp"si*a\, n. [NL., from Gr. ? a shining forth,
   fr. ? to shine forth; ? out + ? to shine.] (Med.)
   A fancied perception of flashes of light, a symptom of
   epilepsy; hence, epilepsy itself; convulsions.

   Note: The term is generally restricted to a convulsive
         affection attending pregnancy and parturition, and to
         infantile convulsions.

Source : WordNet®

eclampsia
     n : a toxic condition characterized by convulsions and possibly
         coma during or immediately after pregnancy