1854 Aug. 198/1 A trough for chalk, sponges, scales, and pointing rods, runs along the bottom of this blackboard.
1947 J. C. Rich ix. 272 The pointing rod indicates the depth of the points marked on the original model or cast.
2002 (Nexis) 6 Aug. 18 ‘Take a shorter swing,’ he commanded, jabbing his pointing rod towards my shoulder.