unibody

The definition of unibody is a type of motor vehicle construction where a single entity or a single molded unit forms a car's body work and chassis.

(adjective)

The molded frame of a hot rod is an example of a unibody construction.

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See unibody in Webster's New World College Dictionary

adjective

designating or of a type of construction used in motor vehicles in which the floor, roof, panels, etc. are welded together into one unit, thereby eliminating the need for a separate frame

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