Inflammation accompanied by mucus secretion, particularly of mucous membranes.
From Greek 'blenna' (mucus) + 'phlogisma' (inflammation, burning). This compound term appeared in medical terminology to describe a specific type of inflammatory response.
The Greek root 'phlog-' meaning 'burning' or 'inflammation' is why we have words like 'phlegm,' 'phlogiston,' and 'phlebotomy'—Greek doctors saw inflammation as a kind of burning.
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