parietal lobe: that part of the cerebral cortex in either hemisphere of the brain lying below the crown of the head
lobe: (anatomy) a somewhat rounded subdivision of a bodily organ or part
vapor lock: a stoppage in a pipeline caused by gas bubbles (especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of gasoline to the carburetor)