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