EQ:rez
Rez is short for resurrect. When a player dies they lose a significant amount of level experience gained and their corpse remains where they fell but the player is returned to their "bind" point naked. This means the player can pay a NPC to summon their corpse, have another player at their corpse location "rez" them, or travel without the benefit of items & armor to their fallen corpse to retrieve their gear.
Rez can refer to anything from Reanimation (cleric level twelve spell that simply returns you to your corpse with no experience return) all the way to Reviviscence which provides you with a 96% return of lost experience from the death. There are many variations of rez's that have increasing pecentages of experience returned. Clerics have the best resurrection spells, with paladins providing experience returns not far behind but topping at 90%. There are additional forms of rez's including items with a clickable effect and alternate abilities.
Necromancers can rez with spell Convergance at level 53, and returns 93% of the experience lost. The utility of this spell is offset as it consumes an Essence Emerald, which can only be created by another level 45 or higher player sacrificing him or herself (causing a death that cannot normally be reversed with another form of resurrection. ) Necro rez's are thus quite costly to perform and generally not a expected role outside of the raid environment.