epidural

[ep-i-door-uhl, -dyoor-]
adjective
1.
Anatomy. situated on or outside the dura mater.
noun
2.
Pharmacology, epidural anesthesia.

Origin:
1880–85; < epi- + dur(a mater) + -al-1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
epidural (ˌɛpɪˈdjʊərəl)
 
adj
1.  Also: extradural upon or outside the dura mater
 
n
2.  Also called: epidural anaesthesia
 a.  injection of anaesthetic into the space outside the dura mater enveloping the spinal cord
 b.  anaesthesia induced by this method
 
[C19: from epi- + dur(a mater) + -al1]

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

epidural
1882, from epi + dura (mater) (see dura mater). The noun meaning injection into the epidural region (usually during childbirth) is attested by 1970.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

epidural ep·i·du·ral (ěp'ĭ-dur'əl, -dyur'-)
adj.
Located on or over the dura mater. n.
An injection into the epidural space of the spine.

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
epidural   (ěp'ĭ-dr'əl)  Pronunciation Key 
Adjective   Located on or over the dura mater.

Noun   An injection into the epidural space of the spine, as an epidural anesthetic.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The epidural sensor is placed through a burr hole drilled in the skull.
For older or sicker patients, epidural or spinal anesthesia may be used.
Talbot never mentions that it is a slippery slope from the epidural to more serious intervention.
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