oxygen cycle

noun

Definition of oxygen cycle

: the cycle whereby atmospheric oxygen is converted to carbon dioxide in animal respiration and regenerated by green plants in photosynthesis

First Known Use of oxygen cycle

1935, in the meaning defined above

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The first known use of oxygen cycle was in 1935

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Cite this Entry

“Oxygen cycle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oxygen%20cycle. Accessed 20 Oct. 2020.

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Britannica.com: Encyclopedia article about oxygen cycle

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