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operating room

noun
1.
a specially equipped room, usually in a hospital, where surgical procedures are performed.
Abbreviation: OR.
Origin
1885-1890
1885-90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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operating room in Medicine

operating room n.
A room equipped for performing surgical operations.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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