The process of reacting or treating something with oxygen(noun)
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Use "oxygenation" in a sentence
"There's nothing magical about a 3:2 ratio, certainly nothing to do with "oxygenation" or any sciency-smart-sounding BS."
"When carbonic acid gas is inhaled, the blood circulating through the lungs does not undergo that process of oxygenation which is essential to life, as has been explained in a preceding chapter."
"She would have periods of very low oxygenation, which would result in confusion and combativeness."