1. Milled, as the head of a screw, or the edge of a coin 
2. Full of knots; gnarled

1. To provide with ridges, to assist the grasp, as in the edge of a flat knob, or coin; to mill

Encyclopedia: Knurl

• trouble spot
• trouble-free
• troubled
• troublemaker
• troubler
• troubleshoot
• troubleshooter
• troublesome
• troublesomeness
• troubling
• troublous
• trough
• trounce
• trouncing
• troupe
• trouper
• troupial
• trouser
• trouser clip
• trouser cuff
• trouser leg
• trouser press
• trouser suit
• trousered
• trousering