Where does “crotaloid” come from?

crotaloid (English) comes from Translingual Crotalus, from Latin crotalum, from Ancient Greek κρόταλον, from Ancient Greek κροτέω — to rattle.

crotaloid (English): Resembling the genus "Crotalus" of venomous...

Definitions

Step	Language	Word	Meaning
1	Translingual	Crotalus	—
2	Latin	crotalum	castanet
3	Ancient Greek	κρόταλον	clapper, rattle, castanet
4	Ancient Greek	κροτέω	to rattle