anaesthesia

[an-uhs-thee-zhuh]
noun Medicine/Medical, Pathology.

anaesthetic [an-uhs-thet-ik] , adjective, noun
anaesthetist [uh-nes-thi-tist or, esp. British, uh-nees-] , noun
semianaesthetic, adjective
Dictionary.com Unabridged

anesthetic

[an-uhs-thet-ik]
noun
1.
a substance that produces anesthesia, as halothane, procaine, or ether.
adjective
2.
pertaining to or causing physical insensibility: an anesthetic gas.
3.
physically insensitive: Halothane is used to produce an anesthetic state.
Also, anaesthetic.


Origin:
1840–50, Americanism; < Greek anaísthēt(os) without feeling, senseless + -ic; see an-1, esthetic

anesthetically, adverb
nonanesthetic, adjective, noun
postanesthetic, adjective
semianesthetic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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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]

anaesthetic or (US) anesthetic (ˌænɪsˈθɛtɪk)
 
n
1.  a substance that causes anaesthesia
 
adj
2.  causing or characterized by anaesthesia
 
anesthetic or (US) anesthetic
 
n
 
adj

anesthetic (ˌænɪsˈθɛtɪk)
 
n, —adj
the usual US spelling of anaesthetic

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

anaesthesia
1721, "loss of feeling," Mod.L., from Gk. anaisthesia "lack of sensation," from an- "without" + aisthesis "feeling," from PIE base *au- "to perceive" (see audience).

anaesthetic
1846, "insensible," from Gk. anaisthetos "without feeling" (see anaesthesia). Noun meaning "agent that produces anesthesia" first used in modern sense 1848 by professor James Young Simpson (1811-1870), discoverer of chloroform.

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

anesthetic an·es·thet·ic (ān'ĭs-thět'ĭk)
n.
An agent that reversibly depresses neuronal function, producing total or partial loss of sensation. adj.

  1. Characterized by the loss of sensation.

  2. Capable of producing a loss of sensation.

  3. Associated with or due to the state of anesthesia.


an'es·thet'i·cal·ly adv.
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
anesthetic   (ān'ĭs-thět'ĭk)  Pronunciation Key 
A drug that temporarily depresses neuronal function, producing total or partial loss of sensation with or without the loss of consciousness.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
anesthetic [(an-is-thet-ik)]

A substance that causes loss of sensation or consciousness. With the aid of an anesthetic, people can undergo surgery without pain. (See general anesthetic and local anesthetic.)

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
The anaesthetic drugs specified are going out of fashion and there fore
  becoming in short supply.
We went to the wards put people on stretchers, wheeled them to the anaesthetic
  room.
As the plan is to administer the anaesthetic while the patient sleeps, it is no
  wonder that failure attends the effort.
The walk could become a phantom biopsy, cutting out a sample of diseased tissue
  without an anaesthetic.
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