Medical Dictionary
prebreathe
vt pre·breathe \(ˈ)prē-ˈbrēth\
pre·breathedpre·breath·ing
Medical Definition of PREBREATHE
: 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
—pre·breath·ing \-iŋ\ noun
Seen & Heard
What made you want to look up prebreathe? Please tell us where you read or heard it (including the quote, if possible).