adjective
purulent
PYUR-uh-lunt/ˈpjʊrələnt/
Containing, producing, or resembling pus.
Thick yellow-white purulent fluid emerges from the small inflamed pustule.

Etymology
The Latin formation describes something “full of pus.” Its early English use for a pus-like color shows how the adjective could refer to resemblance as well as to actual pus.
In context
when they're infected we do see a surface of it with a bio ooze or slimy quality or we could see actual purulent debris on top of an abrasion and then we know it's infected
More examples
- A purulent blister forms on the infected finger.
- The doctor drains purulent fluid from the abscess.
- The drainage looks purulent rather than clear.
Forms
purulent
purulence noun — The presence or production of pus.
Similar words
- suppurative
- Specifically describes conditions that produce pus, not merely resemble it.