British spelling of eupnea; normal, healthy, unforced breathing with a regular pattern.
From Greek eu- (good) + pnoe (breathing), with British spelling preference for -noea over -nea. Identical meaning to American eupnea.
British medical texts use 'eupnoea' just like American doctors use 'eupnea'—it's the same word with a spelling preference, which reminds us that medicine developed internationally but kept some spelling differences.
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