spinal anesthesia (SPY-nul A-nes-THEE-zhuh)
A temporary loss of feeling in the abdomen and/or the lower part of the body. Special drugs called anesthetics are injected into the fluid in the lower part of the spinal column to cause the loss of feeling. The patient stays awake during the procedure. It is a type of regional anesthesia. Also called SAB, spinal block, and subarachnoid block.