spinal tap(n = noun.act) lumbar puncture, spinal puncture - removal by centesis of fluid from the subarachnoid space of the lumbar region of the spinal cord for diagnostic or therapeutic purposes;
is a kind of centesis

herediatry spinal ataxia, on tap, spinal, spinal accessory, spinal anaesthesia, spinal anaesthetic, spinal anesthesia, spinal anesthetic, spinal canal, spinal column, spinal cord, spinal curvature, spinal fluid, spinal fusion, spinal nerve, spinal puncture, spinal vein, tap, tap dance, tap dancer, tap dancing, tap house, tap out, tap water, tap wrench, water tap