underframe

[ uhn-der-freym ]

noun

1. the lower frame on which a vehicular structure rests:

   the underframe of a bus.

Word History and Origins

Origin of underframe¹

First recorded in 1850–55; under- + frame

Example Sentences

On this underframe the superstructure or frame is erected to form the body of the car.

From Project Gutenberg

M, is of the internal pole type, and is supported on the underframe of the wagon.

From Project Gutenberg

The underframe is provided with spring axle boxes, and also with spring buffers and drawbars.

From Project Gutenberg