knurl

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knurl

, nurl
a small ridge, esp one of a series providing a rough surface that can be gripped

knurl

[nərl]
(engineering)
To provide a surface, usually a metal, with small ridges or knobs to ensure a firm grip or as a decorative feature.

knur, knurl

A knot or burl, 1 in wood.
References in periodicals archive ?
NURL full back Liam Clarke provided more than a match for Bahadori and Jardine's tactical kicking, collecting every kick and surging his way up the turf as though running on hot coals, despite the impediment of only possessing three studs in his archaic boots.
NURL firebrand Chris Blain ensured that this was not the end of the action, with the prop hunting for poly teeth with his burly arm rarely lowering from horizontal.
As a dejected Northumbria team trudged from the battle ground, Andy Stanton wore a smile as wide as Christmas Day, safe in the knowledge that NURL had contributed their part to a stunning Stan Calvert victory over their city rivals.