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Meaning of scanning tunneling microscope

scan'ning tun'neling mi"croscope

Pronunciation: [key]
  1. a device that uses a moving needle and the tunnel effect to generate a maplike image of the atomic surface structure of matter, thereby achieving even greater magnification than the scanning electron microscope.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.