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cho·re·a(kô-rē′ə, kō-, kə-)
Any of various disorders of the nervous system marked by involuntary, jerky movements, especially of the arms, legs, and face, and by incoordination.
[New Latin chorēa (Sānctī Vitī), (Saint Vitus') dance, from Latin chorēa, from Greek khoreia, choral dance, from khoros; see chorus.]
cho·re′ic (-ĭk) adj.