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field'-i•on mi"croscope



Pronunciation: (fēld'ī"un, -ī"on), [key]
a device in which the atomic structure of the surface of a conductor is made visible by introducing helium gas into the device and applying a high voltage to ionize and accelerate the gas toward a fluorescent screen. Cf. field-emission microscope.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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