CHASSIS (Fr. châssis, a frame, from the Late. Lat. capsum, an enclosed space), properly a window-frame, from which is derived the word "sash"; also the movable traversing frame of a gun, and more particularly that part of a motor vehicle consisting of the wheels, frame and machinery, on which the body or carriage part rests.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)