noun, plural rhizotomies. Surgery.
the surgical section or cutting of the spinal nerve roots, usually posterior or sensory roots, to eliminate pain.

1910–15; rhizo- + -tomy

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World English Dictionary
rhizotomy (raɪˈzɒtəmɪ)
n , pl -mies
surgical incision into the roots of spinal nerves, esp for the relief of pain

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American Heritage
Medical Dictionary

rhizotomy rhi·zot·o·my (rī-zŏt'ə-mē)
Surgical severance of spinal nerve roots, as for the relief of pain. Also called radicotomy, radiculectomy.

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