oxygen cycle

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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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Origin of oxygen cycle

First recorded in 1930–35

Words nearby oxygen cycle

oxygen acid, oxygenase, oxygenate, oxygenator, oxygen bar, oxygen cycle, oxygen debt, oxygen effect, oxygenize, oxygen lance, oxygen mask

How to use oxygen cycle in a sentence

It almost mirrors the Buddhist cycle of life, death, and rebirth.
The Buddhist Business of Poaching Animals for Good Karma|Brendon Hong|December 28, 2014|DAILY BEAST
Eventually, the mistletoe bush grows, blooms, and forms berries, and the cycle begins anew.
Mistletoe is the Vampire of Plants|Helen Thompson|December 21, 2014|DAILY BEAST
The Newsroom aired its final episode on Sunday, already an eternity ago in news-cycle terms.
A Few Great Men Too Many: Aaron Sorkin Doesn’t Think You Can Handle the Truth|Arthur Chu|December 21, 2014|DAILY BEAST
The others are difficult to identify, since they reacted with other oxygen-bearing molecules in the soil.
Methane on Mars: Life or Just Gas?|Matthew R. Francis|December 17, 2014|DAILY BEAST

It reacts very readily with oxygen by burning smokelessly, with carbon dioxide and water as its byproducts.
Methane on Mars: Life or Just Gas?|Matthew R. Francis|December 17, 2014|DAILY BEAST
In the lungs hemoglobin forms a loose combination with oxygen, which it readily gives up when it reaches the tissues.
A Manual of Clinical Diagnosis|James Campbell Todd
They are cells which have been highly differentiated for the purpose of carrying oxygen from the lungs to the tissues.
A Manual of Clinical Diagnosis|James Campbell Todd
The sexual cycle can take place only within the body of one genus of mosquito, anopheles.
A Manual of Clinical Diagnosis|James Campbell Todd
Here they enter red corpuscles as young malarial parasites, and the majority pass through the asexual cycle just described.
A Manual of Clinical Diagnosis|James Campbell Todd
Its most important compound is water, of which it forms one-ninth, the other eight-ninths consisting of oxygen.
Elements of Agricultural Chemistry|Thomas Anderson