Van Allen radiation belt
noun
Van Al·len radiation belt
va|ˈnalə̇n-,
və|
: a belt of intense ionizing radiation that surrounds the earth in the outer atmosphere, has particles carrying energies of from approximately 20,000 electron volts to several million electron volts or more, and has an outer zone that extends into space to a distance of about 55,000 kilometers
Love words? Need even more definitions?
Merriam-Webster unabridged
Share