hypervelocity

[ hahy-per-vuh-los-i-tee ]
/ ˌhaɪ pər vəˈlɒs ɪ ti /

noun, plural hy·per·ve·loc·i·ties.

extremely high velocity, as of projectiles, space vehicles, or accelerated nuclear particles.

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Origin of hypervelocity

First recorded in 1945–50; hyper- + velocity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020