Anoxia

Anoxia means a total depletion in the level of oxygen, an extreme form of hypoxia or "low oxygen". The terms anoxia and hypoxia are used in various contexts:


 * Anoxic waters, sea water, fresh water or groundwater that are depleted of dissolved oxygen
 * Anoxic event, when the Earth's oceans become completely depleted of oxygen below the surface levels
 * Euxinic, anoxic conditions in the presence of hydrogen sulfide
 * Hypoxia (environmental), low oxygen conditions
 * Hypoxia (medical), when the body or a region of the body is deprived of adequate oxygen supply
 * Cerebral anoxia, when the brain is completely deprived of oxygen, an extreme form of cerebral hypoxia