noun
a device that absorbs carbon dioxide from exhaled air and supplies oxygen for inhalation, used in underwater diving and in some medical procedures
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The diver used a rebreather to recycle the air they were breathing underwater.
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I heard rebreathers are great for diving because they let you stay underwater longer.
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I'm thinking about investing in a rebreather so I can explore the ocean without worrying about running out of air.
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Using a rebreather in this situation is like finding a way to make resources last longer.