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Power wheel

noun

Noun

1
A kind of gear in a gun or torpedo mount. US, obsolete
"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
An ab wheel (trademark by Lifeline Fitness). US, rare
"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)."

Unscramble this word: powerwheel