noun, plural cordotomies.
the surgical severance of certain nerve fibers of the spinal cord to alleviate intractable pain.
Also, chordotomy.

cord + -o- + -tomy Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

cordotomy cor·dot·o·my or chor·dot·o·my (kôr-dŏt'ə-mē)

  1. An operation on the spinal cord.

  2. Surgical division of tracts of the spinal cord, as for the relief of severe pain.

The American Heritage® Stedman's Medical Dictionary
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