wigwag

English

Noun

wigwag (plural wigwags)

1. Any of a number of mechanical or electrical devices which cause a component to oscillate between two states.

Verb

wigwag (third-person singular simple present wigwags, present participle wigwagging, simple past and past participle wigwagged)

1. to oscillate between two states.
2. to send a signal by waving a single flag.