Source : Webster's Revised Unabridged Dictionary (1913)

Chorea \Cho*re"a\ n. [NL., fr. Gr. ? dance.] (Med.)
   St. Vitus's dance; a disease attended with convulsive
   twitchings and other involuntary movements of the muscles or
   limbs.

Source : WordNet®

chorea
     n 1: chorea in dogs [syn: {canine chorea}]
     2: any of several degenerative nervous disorders characterized
        by spasmodic movements of the body and limbs