Source : Webster's Revised Unabridged Dictionary (1913)

Cataplexy \Cat"a*plex`y\, n. [Gr. ? amazement: cf. {Apoplexy}.]
   (Med.)
   A morbid condition caused by an overwhelming shock or extreme
   fear and marked by rigidity of the muscles. --
   {Cat`a*plec"tic}, a.