crŏtălum, i, n., = κρόταλον,
a rattle, a bell, castanet , used to accompany wanton dances, P. Scip. ap. Macr. S. 2, 10; Cic. Pis. 9, 20 al.
crotalum ī, n , κρόταλον, a rattle, bell, castanet. ...
An Elementary Latin Dictionary
·noun A kind of castanet used by the Corybantes. ...
Webster's Dictionary of the English Language