Regeneration

In World of Warcraft, regeneration can mean a few things:
 * Health regeneration.
 * Mana regeneration.
 * A passive ability that provides 10% health regen bonus and allows a 10% health regeneration during combat. This is a racial trait of Trolls. See Regeneration (racial).
 * A buff that grants a Heal over Time or mana gain over time from a spell (like Blessing of Wisdom, Healing Stream Totem, Rejuvenation, or Renew) or potion (like any potion with "Troll's Blood" in the name or Mageblood Potion).
 * A property of an item that grants a Heal over Time or mana gain over time when equipped.
 * An enchant (Enchant Bracer - Mana Regeneration) for bracers that grants mana gain over time property.