chorea (n.)youdaoicibaDictYouDict[chorea 词源字典]
1806, from Modern Latin chorea Sancti Viti "St. Vitus dance" (originally a mass hysteria in 15c. Europe characterized by uncontrolled dancing); from Latin chorea "a dance," from Greek khoreia "dance" (see chorus). Extension to the nerve disorder is from 1620s.[chorea etymology, chorea origin, 英语词源]