electron microscope

device that focuses a beam of electrons to form a greatly enlarged image of an object

An electron microscope is a type of microscope that uses electrons as a way to illuminate and create an image of a specimen. It has much higher magnification and resolving power than a light microscope, with magnifications up to about two million times, compared to about two thousand that can be achieved with visible light.
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Electron microscope n. Abbr. EM Any of a class of microscopes that use electrons rather than visible light to produce magnified images, especially [more]Electron microscope - Community and Resources

Noun
1. a microscope that is similar in purpose to a light microscope but achieves much greater resolving power by using a parallel beam of electrons to illuminate the object instead of a beam of light
(hypernym) microscope
(hyponym) field-emission microscope
(part-meronym) electron gun

Microscope that uses electron beams rather than light beams to provide a magnified image of tiny particles. The electron microscope is more powerful than the light microscope and in some diseases can provide detailed images that lead to the diagnosis of specific conditions.