The Collaborative International Dictionary of English v.0.48:
Microscope \Mi"cro*scope\, n. [Micro- + -scope.]
An optical instrument, consisting of a lens, or combination
of lenses, for making an enlarged image of an object which is
too minute to be viewed by the naked eye.
Compound microscope, an instrument consisting of a
combination of lenses such that the image formed by the
lens or set of lenses nearest the object (called the
objective) is magnified by another lens called the ocular
Oxyhydrogen microscope, and Solar microscope. See under
Oxyhydrogen, and Solar.
Simple microscope, or Single microscope, a single convex
lens used to magnify objects placed in its focus.