Pronunciation: (nûrl), [key]
1. a small ridge or bead, esp. one of a series, as on a button for decoration or on the edge of a thumbscrew to assist in obtaining a firm grip.
2. a knur.
to make knurls or ridges on. Also,nurl.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.