An act of wigwagging.
Any of a number of mechanical or electrical devices which cause a component to oscillate between two states.
A signal sent by waving a flag to and fro.
To move gently in one direction and then another; to wig or wiggle, to wag or waggle.
To oscillate between two states.
To send a signal by waving a flag to and fro.
With a wigwagging or to-and-fro motion.