Emily Dickinson Lexicon

GNO-MI-O-MET'RIC-AL, a. [Gr. γνωμων, an index, and μετρεω, to measure.]

The gnomiometrical telescope and microscope is an instrument for measuring the angles of crystals by reflection, and for ascertaining the inclination of strata, and the apparent magnitude of angles when the eye is not placed at the vertex. Brewster.