A base frame, or movable railway, along which the carriage of a mounted gun moves backward and forward.
A woman's buttocks.
The base frame of a motor vehicle.
A frame or housing containing electrical or mechanical equipment, such as on a computer.
The layer of gravel or other foundation on which a railway track is laid.
The land on which a railway (especially one that has been closed or dismantled) was built; the roadbed for a railroad.