(military) 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.

(physics) associated with zero on any scale, but particularly with a temperature of absolute zero

plural of zero point

(physics, quantum mechanics) The lowest possible energy of a given quantum mechanical system.

plural of zero-point energy