Etymology
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velocity (n.)

early 15c., from Latin velocitatem (nominative velocitas) "swiftness, speed," from velox (genitive velocis) "swift, speedy, rapid, quick," of uncertain origin, perhaps related to vehere "carry" (from PIE root *wegh- "to go, move, transport in a vehicle"), or from PIE *weg-slo-, suffixed form of root *weg- "to be strong, be lively."

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Definitions of velocity

velocity (n.)
distance travelled per unit time;
Synonyms: speed
From wordnet.princeton.edu