Definify.com
Webster 1913 Edition
Tarantism
Tar′ant-ism
,Noun.
(Med.)
A nervous affection producing melancholy, stupor, and an uncontrollable desire to dance. It was supposed to be produced by the bite of the tarantula, and considered to be incapable of cure except by protracted dancing to appropriate music.
[Written also
tarentism
.]