Relating to or affecting both sides of the alveoli, the tiny air sacs in the lungs.
From Latin 'bi-' meaning two and 'alveolus' meaning small hollow or cavity, specifically lung sacs. Used in medical terminology since the 19th century.
When doctors say a patient has 'bialveolar infiltrates,' they mean both lungs are affected—it's medical shorthand that saves time in urgent situations.
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