anesthesia

[an-uhs-thee-zhuh]
noun
1.
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.
2.
Pathology. general loss of the senses of feeling, as pain, heat, cold, touch, and other less common varieties of sensation.
3.
Psychiatry. absence of sensation due to psychological processes, as in conversion disorders.


Origin:
1715–25; < Neo-Latin < Greek anaisthēsía want of feeling. See an-1, esthesia

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World English Dictionary
anaesthesia or (US) anesthesia (ˌænɪsˈθiːzɪə)
 
n
1.  local or general loss of bodily sensation, esp of touch, as the result of nerve damage or other abnormality
2.  loss of sensation, esp of pain, induced by drugs: called general anaesthesia when consciousness is lost and local anaesthesia when only a specific area of the body is involved
3.  a general dullness or lack of feeling
 
[C19: from New Latin, from Greek anaisthēsia absence of sensation, from an- + aisthēsis feeling]
 
anesthesia or (US) anesthesia
 
n
 
[C19: from New Latin, from Greek anaisthēsia absence of sensation, from an- + aisthēsis feeling]

anesthesia (ˌænɪsˈθiːzɪə)
 
n
the usual US spelling of anaesthesia

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

anesthesia
alt. spelling of anaesthesia (q.v.). See ae.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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

  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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American Heritage
Science Dictionary
anesthesia   (ān'ĭs-thē'zhə)  Pronunciation Key 
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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American Heritage
Cultural Dictionary
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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Example sentences for anesthesia
In topical anesthesia, patient cooperation is a must for a smooth procedure.
Heroin was also found to be twice as potent as morphine in surgical anesthesia.
Eeg under general anesthesia depends on the type of anesthetic employed.
The procedure is performed under local anesthesia, making it more or less
  painless.
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