myelotome

my·el·o·tome

(mī-ĕl'ō-tōm),
An instrument used in making serial sections of the spinal cord or for incising the spinal cord.
[myelo- + G. tomos, cutting]

myelotome

(mī′ĕ-lō-tōm″) [ myelo- + -tome]
A tool for dissecting the spinal cord, particularly in post mortem examination.