'Lucernal microscope' definitions:

Definition of 'Lucernal microscope'

From: GCIDE

Lucernal \Lu*cer"nal\, a. [L. lucerna a lamp.] Of or pertaining to a lamp. [1913 Webster]
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 independent of it. [1913 Webster]