cage
n.— «Strachan said people in cars—which he refers to as “cages”—have a tendency to overlook motorcycles because they’re smaller. And they just aren’t looking for them. Car drivers should always turn to check their blind spots and not rely solely on their mirrors.» —“Uneasy Rider: For bikers, safety is more than wearing a helmet” by Jenn Rowell Free Lance-Star (Fredericksburg, Virginia) June 18, 2006. (source: Double-Tongued Dictionary)