1. A reference to a habitat that has a natural atmospheric level of oxygen: While hiking in the very high mountains where the oxygen levels in the atmosphere were thin, oxygen tanks were necessary for the hikers, Conrad and Errol, in order to maintain a more normoxic breathing.
2. Pertaining to having standard levels of oxygen in the body, etc.: The bedside monitor ensured that Joe received the normoxic amount of proper air to breath during his illness.