Antimagic

Antimagic is a descriptor that applies to a variety of effects, and as a result is rarely used in published D&D lore. It can be used to refer to the effects of the spells dispel magic or antimagic field, which are both types of antimagic spell, or to effects such as the Beholder's antimagic cone, which replicates the effects of the aforementioned antimagic field spell.