the world > space > shape > unevenness > condition or fact of receding > condition or action of indentation of edge > [adjective] > knurled or milled (2)
Having knurls wrought on the edge or surface; crenated, milled.
In extended use: marked with transverse grooves or ribs; esp. (of the head of a screw, etc.) notched to afford a hold for adjustment; (of metal) cut…