Meaning of pannus

pan•nus

Pronunciation: (pan'us), [key]
— n.
    1. an abnormal vascular thickening of the cornea.
    2. an ingrowth of synovial material into a joint, as in rheumatoid arthritis.
  1. a group of ragged cloud fragments hanging below a cloud.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.