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[an-l-jee-zee-uh, -see-uh] /ˌæn lˈdʒi zi ə, -si ə/
noun, Medicine/Medical
absence of sense of pain.
1700-10; < New Latin < Greek analgēsía painlessness, equivalent to análgēt(os) without pain (an- an-1 + álg(os) pain + -ētos adj. suffix) + -ia -ia Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for analgesia


/ˌænəlˈdʒiːzɪə; -sɪə/
inability to feel pain
the relief of pain
Word Origin
C18: via New Latin from Greek: insensibility, from an- + algēsis sense of pain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for analgesia

"absence of pain," 1706, medical Latin, from Greek analgesia "painlessness, insensibility," from analgetos "without pain, insensible to pain" (also "unfeeling, ruthless"), from an- "not" (see an- (1)) + algein "to feel pain" (see -algia).

Online Etymology Dictionary, © 2010 Douglas Harper
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analgesia in Medicine

analgesia an·al·ge·si·a (ān'əl-jē'zē-ə, -zhə)
A deadening or absence of the sense of pain without loss of consciousness.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for analgesia

loss of sensation of pain that results from an interruption in the nervous system pathway between sense organ and brain. Different forms of sensation (e.g., touch, temperature, and pain) stimulating an area of skin travel to the spinal cord by different nerve fibres in the same nerve bundle. Therefore, any injury or disease affecting the nerve would abolish all forms of sensation in the area supplied by it. When sensory nerves reach the spinal cord, however, their fibres separate and follow different courses to the brain. Thus, it is possible for certain forms of sensation to be lost, while others are preserved, in diseases that affect only certain areas of the spinal cord. Because pain and temperature sensations often travel the same path, both may be lost together. Diseases of the spinal cord that may cause analgesia without loss of the sensation of touch are tabes dorsalis, syringomyelia, and tumours of the cord. The term is also used for pain relief induced by the action of such medications as aspirin, codeine, and morphine.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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