Definition of pyosis in US English:

pyosis

noun

Medicine
  • Originally: a collection of pus, especially within the eye. Later also: the formation of pus; suppuration; pyogenic infection.

Origin

Late 17th century; earliest use found in Blankaart's Physical Dictionary. From post-classical Latin pyosis collection of pus from Hellenistic Greek πύωσις suppuration from ancient Greek πύον pus + -ωσις.

Pronunciation

pyosis

/pʌɪˈəʊsɪs/