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Noun: knurl  nurl
  1. A contorted knot in wood; a cross-grained protuberance; a nodule; a boss or projection
    - knur
Verb: knurl  nurl
  1. To provide with ridges, to assist the grasp, as in the edge of a flat knob, or coin; to mill

Derived forms: knurls, knurled, knurling

Encyclopedia: Knurl