What is the meaning of Pannus?

A hanging flap of skin or other tissue, especially one covering the cornea (in trachoma) or cartilage (in rheumatoid arthritis).

A type of accessory cloud, looking like shreds either attached to, or separated from, the main cloud formation; mainly associated with nimbostratus, cumulus, and cumulonimbus.

A tent for a wound.

A birthmark on the skin.

cloth

rag

garment

Source: wiktionary.org