Final answer:
A microscope designed for side-by-side viewing of two specimens with a 3D view is called a stereo microscope.
Step-by-step explanation:
The microscope that enables side-by-side viewing of two different specimens through a single set of eyepieces, providing a three-dimensional view and allowing for the examination of thick objects with many components in focus simultaneously, is referred to as a stereo microscope. These microscopes are specifically designed to offer a magnified, clear view of tissue structure and the anatomy of entire organisms. Unlike compound microscopes, which are also constructed from two convex lenses (one being the ocular lens and the other the objective lens), stereo microscopes use two separate optical paths to provide a sense of depth in the view of the subject, making manual manipulations easier, with typical magnifications between 20x and 80x.