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or anaesthesia

[an-uh s-thee-zhuh] /ˌæn əsˈθi ʒə/
Medicine/Medical. general or local insensibility, as to pain and other sensation, induced by certain interventions or drugs to permit the performance of surgery or other painful procedures.
Pathology. general loss of the senses of feeling, as pain, heat, cold, touch, and other less common varieties of sensation.
Psychiatry. absence of sensation due to psychological processes, as in conversion disorders.
Origin of anesthesia
1715-25; < New Latin < Greek anaisthēsía want of feeling. See an-1, esthesia Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for anesthesia


the usual US spelling of anaesthesia
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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Word Origin and History for anesthesia

alternative spelling of anaesthesia (q.v.). See ae.

Online Etymology Dictionary, © 2010 Douglas Harper
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anesthesia in Medicine

anesthesia an·es·the·sia (ān'ĭs-thē'zhə)

  1. Total or partial loss of sensation, especially tactile sensibility, induced by disease, injury, acupuncture, or an anesthetic.

  2. Local or general insensibility to pain with or without the loss of consciousness, induced by an anesthetic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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anesthesia in Science
Total or partial loss of sensation to touch or pain, caused by nerve injury or disease, or induced intentionally, especially by the administration of anesthetic drugs, to provide medical treatment. The first public use of ether to anesthetize a patient in Boston in 1846 initiated widespread acceptance of anesthetics in the Western world for surgical procedures and obstetrics. General anesthesia, administered as inhalation or intravenous agents, acts primarily on the brain, resulting in a temporary loss of consciousness. Regional or local anesthesia affects sensation in a specific anatomic area, and includes topical application of local anesthetics, blocking of peripheral nerves, spinal anesthesia, and epidural anesthesia, which is used commonly during childbirth.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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anesthesia in Culture
anesthesia [(an-is-thee-zhuh)]

Loss of sensation or consciousness. Anesthesia can be induced by an anesthetic, by acupuncture, or as the result of injury or disease.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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