What does abscess mean?
The definition of abscess
Ab”scess, n.; pl. Abscesses.
Etym: [L. abscessus a going away, gathering of humors, abscess, fr. abscessus, p. p. of absedere to go away; ab, abs + cedere to go off, retire. See Cede.] (Med.)

A collection of pus or purulent matter in any tissue or organ of the body, the result of a morbid process. Cold abscess, an abscess of slow formation, unattended with the pain and heat characteristic of ordinary abscesses, and lasting for years without exhibiting any tendency towards healing; a chronic abscess.