1. removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes; [syn: lumbar puncture, spinal puncture, spinal tap]
WordNet (r) 3.0 (2006):
lumbar puncture
n 1: removal by centesis of fluid from the subarachnoid space of
the lumbar region of the spinal cord for diagnostic or
therapeutic purposes [syn: lumbar puncture, spinal
puncture, spinal tap]