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gamma knife

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noun
an machine that uses radiation with extreme accuracy to destroy abnormal tissue, esp in the brain
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The rainy weather could not ________ my elated spirits on my graduation day.
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Medical definitions for gamma knife

Gamma Knife

A trademark for a radiologic nonsurgical device used in stereotactic radiosurgery.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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