a medical term which means a deficiency but not a total lack of oxygen
Hypoxia (medical) Hypoxia differs from hypoxemia and anoxemia in that hypoxia refers to a state in which oxygen supply is insufficient, whereas hypoxemia and anoxemia refer specifically to states that have low or zero arterial oxygen supply.[3] Hypoxia in which there is complete deprivation of oxygen supply is referred to as anoxia.