truck [truhk] / trʌk /
noun
> any of various forms of vehicle for carrying goods and materials, usually consisting of a single self-propelled unit but also often composed of a trailer vehicle hauled by a tractor unit.
> any of various wheeled frames used for transporting heavy objects.
> Also called hand truck. a barrowlike frame with low wheels, a ledge at the bottom, and handles at the top, used to move heavy luggage, packages, cartons, etc.
> a low, rectangular frame on which heavy boxes, crates, trunks, etc., are moved; a dolly.
> a tiered framework on casters.
> a group of two or more pairs of wheels in one frame, for supporting one end of a railroad car, locomotive, etc.
> Movies. a dolly on which a camera is mounted.
> British. a freight car having no top.
> a small wooden wheel, cylinder, or roller, as on certain old-style gun carriages.
> Nautical. a circular or square piece of wood fixed on the head of a mast or the top of a flagstaff, usually containing small holes for signal halyards.
I see no mention of "body on frame" as part of what makes a truck a truck.