Definition of "synchronoscope" [synchronoscope]

• In electricity, same as synchronizer, 2. (noun)
• An apparatus in which the principle of the revolving mirror is employed for the study of periodic phenomena. (noun)

The Century Dictionary (Public Domain)

• "Over it was a circular dial on which a pointer began to rotate slowly; with his new-found knowledge, Hardy knew this to be a synchronoscope."
• "The pointer of the synchronoscope rotated clockwise as the motor picked up speed, turning ever faster."
• "As synchronizing with these cited circuits is a troublesome business, power stations utilize a so-called synchronoscope."