Source : Webster's Revised Unabridged Dictionary (1913)

Nurl \Nurl\, v. t. [imp. & p. p. {Nurled}; p. pr. & vb. n.
   {Nurling}.] [Cf. {Knurl}.]
   To cut with reeding or fluting on the edge of, as coins, the
   heads of screws, etc.; to knurl.