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
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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]

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).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
When one is spotted, there are no tranquilizer darts or anaesthesia used.
Science is closing in on one of medicine's oldest puzzles-how anaesthesia works.
The problem is that anaesthesia disrupts brain function, so researchers may not see a true picture.
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