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In some senses, gyrobus is marked as historical. Watch for register when choosing this word.
gyrobus
noun 2
Definitions
noun
1
An electric bus which stores energy in a flywheel rotating at high speeds (up to 3000 RPM) rather than batteries.
2
A flying bus.
The gyrobus touched down on the commercial side of the spaceport, not far from a row of hangars where several shuttles were parked.
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