knurl
Webster's Dictionary (GCIDE)
Knurl \Knurl\ (n[^u]rl), n. [See Knar, Gnar.] A contorted knot in wood; a crossgrained protuberance; a nodule; a boss or projection. [1913 Webster]
2.One who, or that which, is crossgrained. [1913 Webster]
Knurl \Knurl\ (n[^u]rl), v. t. To provide with ridges, to assist the grasp, as in the edge of a flat knob, or coin; to mill. [1913 Webster]