n.
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.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.