TRANSECTION By N., Pam M.S. - April 29, 2013 noun. the transverse cutting or severing of something, like a nerve tract or the spinal cord. TRANSECTION: "The transection will complete your lab for this afternoon." Related Psychology Terms SPINAL ROOT TRACTOTOMY GROUND BUNDLE TECTOSPINAL TRACT VENTRAL ROOT GRAY COMMISSURE CUNEATE FASCICULUS FIRST-ORDER NEURON MENINGOMYELOCELE DORSAL ROOT Cite this page: N., Pam M.S., "TRANSECTION," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/transection/ (accessed November 16, 2019).