zero point

The location of the center of a burst of a nuclear weapon at the instant of detonation. The zero point may be in the air, or on or beneath the surface of land or water, depending upon the type of burst, and it is thus to be distinguished from ground zero.

Thesaurus

Noun

1.

zero point - the point on a scale from which positive or negative numerical quantities can be measured zero numerical quantity - a quantity expressed as a number