oxygen cycle

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.

Nearby words

  1. oxygen acid,
  2. oxygen affinity hypoxia,
  3. oxygen bar,
  4. oxygen capacity,
  5. oxygen consumption,
  6. oxygen debt,
  7. oxygen deficit,
  8. oxygen demand,
  9. oxygen effect,
  10. oxygen lance

Origin of oxygen cycle

First recorded in 1930–35

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019