scanning electron microscope

scanning electron microscope

noun
a device in which the specimen is examined point by point directly in a moving electron beam, and electrons reflected by the specimen are used to form a magnified, three-dimensional image on a television screen. Abbreviation: SEM

Origin:
1950–55

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Collins
World English Dictionary
scanning electron microscope
 
n
a type of electron microscope that produces a three-dimensional image

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

scanning electron microscope n.
Abbr. SEM
An electron microscope that forms a three-dimensional image on a cathode-ray tube by moving a beam of focused electrons across an object and reading both the electrons scattered by the object and the secondary electrons produced by it.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
scanning electron microscope   (skān'ĭng)  Pronunciation Key 
An electron microscope that moves a narrowly focused beam of electrons across an object and detects the patterns made by the electrons scattered by the object and the electrons knocked loose from the object. From these patterns a three-dimensional image of the object is created.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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