Anoxia means a total depletion in the level ofoxygen, 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 (medicine), 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 ofcerebral hypoxia
Topics referred to by the same term

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Anoxia.
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