1. An area or region, typically in water bodies or sediments, that is completely depleted of oxygen and cannot support aerobic life forms
The deep waters of the Black Sea form an anoxic zone where no fish can survive.
As águas profundas do Mar Negro formam uma zona anóxica onde nenhum peixe consegue sobreviver.
2. In environmental science, a region characterized by the absence of dissolved oxygen (hypoxia taken to its extreme)
Dead zones in the Gulf of Mexico are anoxic zones caused by agricultural runoff.
As zonas mortas no Golfo do México são zonas anóxicas causadas pelo escoamento agrícola.