Noun
microscope consisting of an optical instrument that magnifies the image of an object
Source: WordNetThe light microscope opened the first gate to microcosm. The electron microscope opened the second gate to microcosm. What will we find opening the third gate? Ernst Ruska
Small bodies, about half a micron in diameter, and later referred to under the name of 'mitochondria' were detected under the light microscope as early as 1894. Albert Claude