myelotome

An instrument used in making serial sections of the spinal cord or for incising the spinal cord. [myelo- + G. tomos, cutting]

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my·elo·tome (miґə-lo-tōm) [myelo- + -tome] 1. an instrument for making sections of the spinal cord. 2. an instrument used for cutting the spinal cord squarely across in removing the brain in postmortem examinations.