hypervelocity

[hahy-per-vuh-los-i-tee]

hy·per·ve·loc·i·ty

[hahy-per-vuh-los-i-tee]
noun, plural hy·per·ve·loc·i·ties.
extremely high velocity, as of projectiles, space vehicles, or accelerated nuclear particles.

Origin:
1945–50; hyper- + velocity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hypervelocity has a plethora of syllables.
So is dichlorodiphenyltrichloroethane. Does it mean:
a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S.
(used as a nonsense word by children to express approval or to represent the longest word in English.)
WordNet
hypervelocity

noun
excessive velocity; "the meteorites struck the earth with hypervelocity impacts" 
WordNet® 3.0, © 2006 by Princeton University.
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