Definition of abscession in US English:

abscession

noun

rare
  • Medicine. Originally: †an abscess (obsolete). In later use (Veterinary Medicine): abscess formation.

Origin

Late 16th century (in an earlier sense). From classical Latin abscēssiōn-, abscēssiō removal, loss, in post-classical Latin also apostasy, departure from abscēss-, past participial stem of abscēdere + -iō. In medical uses in sense 2 apparently by association with abscess and (in later use) abscessation.

Pronunciation

abscession

/abˈsɛʃn/