Abscess (noun)

1. A localized collection of pus that forms in tissues, organs, or spaces in the body, often as a result of an infection.
2. A swollen area filled with pus, typically caused by a bacterial infection.

Origin:

From latin abscessus, meaning "a going away".

Examples:

1. He was diagnosed with a dental abscess and needed to have it drained.
2. The abscess was located deep in her tonsils and had to be removed surgically.
3. The patient had a skin abscess that needed to be lanced and drained.
4. The abscess in her lung was caused by a bacterial infection.
5. If left untreated, an abscess can become serious and cause serious complication.