or RETICULE, in astronomy, a contrivance for the exact measuring the quantity of eclipses.

The reticule is a little frame, consisting of thirteen fine silk threads, equidistant from each other, and parallel, placed in the focus of object-glasses of telescopes; that is, in the place where the image of the luminary is painted in its full extent: of consequence, therefore, the diameter of the sun or moon is hereby seen divided into twelve equal parts or digits; so that, to find the quantity of the eclipse, there is nothing to do but to number the luminous and dark parts. As a square reticule is only proper for the diameter, not for the circumference, of the luminary, it is sometimes made circular by drawing six concentric equidistant circles. This represents the phases of the eclipse perfectly.

Corpus RETICULARE, in anatomy. See ANATOMY, p. 255.