grat·i·cule /ˈgrætəˌkju(ə)l/
  顯微鏡的計數線,格子線
  Grat·i·cule n.  A design or draught which has been divided into squares, in order to reproduce it in other dimensions.
  ◄ ►
  graticule
       n : a network of fine lines, dots, cross hairs, or wires in the
           focal plane of the eyepiece of an optical instrument
           [syn: reticle, reticule]