purulence

After the bandage was removed, the purulence on the cloth told us the cut had become infected.

用法提示：purulence 是名词，在此指脓液，作主语。

The doctor explained that the yellowish purulence was a sign that the body was fighting the bacteria.

用法提示：purulence 是名词，在从句中作主语，指脓液。

She cleaned the wound carefully until no purulence remained, then applied a fresh dressing.

用法提示：purulence 是名词，作宾语，表示脓液。