veloci-, veloc-, velo-

Be swifter than life.

An instrument used to measure the speed of a fluid or sound.

1. Any of various early forms of bicycle or tricycle, including some that had pedals attached to the front wheel or were propelled by pushing the feet along the ground; later it applied to a form of railroad vehicle propelled by pedals and even to a railroad handcar.
2. Etymology: from Latin veloc-, "swift" + ped-, "foot".

Someone who rides a three- or four-wheeled machine driven by the feet and hand levers at the rear or front axle.

A “swift lizard” from Late Cretaceous South America. Named by Argentinian paleontologist José Bonaparte in 1991.

1. The speed at which something moves, happens, or is done: Because the two cars were both driving in exactly the same direction at 60 miles per hour, they were both traveling at the same velocity.
2. A measure of the rate of change in position of something with respect to time, involving speed and direction: A rain drop’s size, and not its density, determines the velocity of its fall.
3. Etymology: from Latin velocitatem; from velocitas, from velox, veloc-, "swift, speedy, rapid, quick". © ALL rights are reserved.

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A stadium that has a banked track for bicycle races.

A device in which the output of a tachogenerator is fed back so as to keep the rotational speed of a shaft proportional to an applied voltage.

An instrument for measuring the speed of air, or of an aircraft through the air.