electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | a journey or route all the way around a particular place or area |
| movement once around a course |
| an electrical device that provides a path for electrical current to flow |
| a racetrack for automobile races |
| (law) a judicial division of a state or the United States (so-called because originally judges traveled and held court in different locations); one of the twelve groups of states in the United States that is covered by a particular circuit court of appeals |
| an established itinerary of venues or events that a particular group of people travel to |
| the boundary line encompassing an area or object |