transitive verb

pre·​breathe (ˈ)prē-ˈbrēt͟h How to pronounce prebreathe (audio)
prebreathed; prebreathing
: to breathe (pure oxygen) to purge the blood of nitrogen content in preparation for an activity (as a space walk) that involves exposure to a significant change in pressure which might otherwise cause decompression sickness
prebreathing noun

Dictionary Entries Near prebreathe

Cite this Entry

“Prebreathe.” Medical Dictionary, Merriam-Webster, Accessed 24 Mar. 2023.

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