Any of a number of mechanical or electrical devices which cause a component to oscillate between two states.
A device that causes one or more lights to flash in a preset pattern.
send a signal by waving a flag or a light according to a certain code
signal by or as if by a flag or light waved according to a code
To move gently in one direction and then another; to wig or wiggle, to wag or waggle.
With a wigwagging or to-and-fro motion.