noun
: an apparatus consisting essentially of a pair of microscope objective lenses and tubes connected by prisms in such a way that images from both may be viewed side by side through a single ocular lens
noun
: an apparatus consisting essentially of a pair of microscope objective lenses and tubes connected by prisms in such a way that images from both may be viewed side by side through a single ocular lens
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012