What term describes a wound filled with pus that leaves an indentation?

The term that accurately describes a wound filled with pus that leaves an indentation is "abscess." An abscess is a localized collection of pus within the tissue, usually resulting from infection, and it often causes swelling and can sometimes lead to the formation of a cavity. When an abscess heals, it may leave behind an indentation in the skin or underlying tissue due to the loss of tissue structure.

In contrast, an ulcer refers to an open sore that can occur on the skin or mucous membranes and may or may not involve pus, but it does typically create a loss of tissue. A fissure is a narrow, slit-like opening or crack in the skin, which doesn't typically fill with pus or create a cavity. A lesion is a broader term that refers to any abnormal tissue change in the body, including wounds, injuries, or infections, but does not specifically denote the presence of pus or an indentation.