Lu·cer'nal adjective [ Latin lucerna a lamp.] Of or pertaining to a lamp. Lucernal microscope , a form of the microscope in which the object is illuminated by means of a lamp, and its image is thrown upon a plate of ground glass connected with the instrument, or on a screen independen... Found on http://www.encyclo.co.uk/webster/L/66
of, like or pertaining to lamps
• (a.) Of or pertaining to a lamp.
Lu·cer'nal adjective [ Latin lucerna a lamp.] Of or pertaining to a lamp. Lucernal microscope ,