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velocities

[vuh-los-i-tee]

Origin

noun, plural -ties.

rapidity of motion or operation; swiftness; speed: a high wind velocity.

Mechanics. the time rate of change of position of a body in a specified direction.

the rate of speed with which something happens; rapidity of action or reaction.

Origin:
1540–50; < Latin vēlōcitās speed. See velocipede, -ty²

Synonyms
1. See speed.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Velocities is always a great word to know.

So is flibbertigibbet. Does it mean:

a chattering or flighty, light-headed person.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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Etymonline

Word Origin & History

velocity

c.1550, from L. velocitatem (nom. velocitas) "swiftness, speed," from velox (gen. velocis) "swift," of uncertain origin, perhaps related to vehere "carry" (see vehicle), or from the same root as vegetable (see vigil).

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

velocity ve·loc·i·ty (və-lŏs'ĭ-tē)
n.
Rapidity or speed of motion; specifically, the distance traveled per unit time.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage

Science Dictionary

velocity