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Phlegm

/flɛm/noun

Thick mucus coughed up from the airways.

The Greek roots

φλέγμα
phlégma
heat, inflammation

Literally: burning, inflammation

Follow a root:φλέγμα1 word

The story of the word

The word comes from φλέγω, to burn, and first meant the heat of an inflamed part. Hippocratic medicine then assigned it to the cold, wet humor, and the sense reversed completely, which is why a phlegmatic person today is the calm and slow one rather than the burning one. Pale mucus in a winter cough took the name because doctors believed that was the humor visibly leaving the body.

How it travelled
Ancient Greek → Latin → Old French → English
First recorded
14th century

Same family

phlegmaticphloxphlogiston

In a sentence

Three days of phlegm and no fever, so the doctor sent him home.

He took the news with the phlegm of a man who had expected worse.

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