Alternative form of aleph-null

The scheduled time for the start of some event, especially a military operation; H-hour.

Of any system where all gains are offset by exactly equal losses.

The strict policy of enforcing all the laws of a state, or the rules of an institution, and allowing no toleration or compromise even for first-time offenders or petty violations.

(chiefly Britain) subject to no value-added tax when sold (but the supplier can still recover VAT attributable to it)

simple past tense and past participle of zero-rate

Originally, the point on the land or water surface below which a nuclear bomb detonates in the air; now also the point on such a surface at or above the detonation.

(of a temperature) below 0°C; freezing cold

Alternative spelling of nonzero

(firearms) The adjustment of a sight, exactly parallel to the axis of the bore of the gun to which it is attached.