A fine line employed as a graticule marker or an index in a precision device. 精密装置,种十标而使。
graticule [ noun ] a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument <noun.artifact>
Graticule \Grat"i*cule\, n. [F. See {Graticulation.}] A design or draught which has been divided into squares, in order to reproduce it in other dimensions.