noun, Ecology.
the process by which oxygen released into the atmosphere by photosynthetic organisms is taken up by aerobic organisms while the carbon dioxide released as a by-product of repiration is taken up for photosynthesis.


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  • Oxygen-debt

    noun, Physiology. 1. the body’s oxygen deficiency resulting from strenuous physical activity. oxygen debt n. The amount of extra oxygen required by muscle tissue to oxidize lactic acid and replenish depleted ATP and phosphocreatine following vigorous exercise.

  • Oxygen deficit

    oxygen deficit n. The difference between oxygen uptake of the body during early stages of exercise and during a similar duration in a steady state of exercise, sometimes considered as the formation of oxygen debt.

  • Oxygen effect

    noun 1. (biology) the increased sensitivity to radiation of living organisms, tissues, etc, when they are exposed in the presence of oxygen

  • Oxygenize

    [ok-si-juh-nahyz] /ˈɒk sɪ dʒəˌnaɪz/ verb (used with object), oxygenized, oxygenizing. 1. .

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