noun see: foul Date: 15th century thick opaque usually yellowish-white fluid matter formed by suppuration and composed of exudate containing white blood cells, tissue debris, and microorganisms
PUS
Meaning of PUS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012