hypervelocity

[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 of hypervelocity

First recorded in 1945–50; hyper- + velocity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019