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]