power wheel

• power-wheel

power wheel (plural power wheels) (US)

1. (obsolete) A kind of gear in a gun or torpedo mount.
   • 1889, Lieutenant J. T. Newton, “Torpedoes”, in Navy Department, Bureau of Navigation, Office of Naval Intelligence, editor, Naval Mobilization and Improvement in Matériel (General Information Series. Information from Abroad; 8), Washington: Government Printing Office, page 432:

     The motor used for giving motion to the power-wheel of the torpedo must, when installed in the service manner, be capable of giving the required speed of rotation to the wheel within one minute of its application.

2. (rare) An ab wheel (trademark by Lifeline Fitness).
   • 2006, Rafael F Escamilla, Eric Babb, Ryan DeWitt, Patrick Jew, Patrick Kelleher, Toni Burnham, Juliann Busch, Kristen D'Anna, Ryan Mowbray, Rodney T Imamura, “Electromyographic analysis of traditional and nontraditional abdominal exercises: implications for rehabilitation and training”, in Physical Therapy‎, volume 86, number 5, →DOI, page 659b:

     The Power Wheel pike and power wheel knee-up exercises started and ended with the subject in the push-up position (trunk, hips, knees, and elbows in full extension, shoulders flexed 90°, and hands on the floor approximately a shoulder width apart), the feet above the floor and attached to Power Wheel straps, and the wheel in a vertical position on the floor (Figs. 3A and 3B).