windsplit

plural windsplits

1. automotiveA stylized crease, accent line, or body contour on a vehicle—typically running along the beltline, fender, hood, or quarter panels—designed to emphasize motion, streamline appearance, or aerodynamics.

   The SS hood also included a bright windsplit ornament.

   2005, Jim Schild, Original Chevelle, 1964-1972, Motorbooks, page 49

   1 more example

   These lamps have a windsplit, tapering from the front to the apex at the rear, ahd this design is duplicated in the two parking lamps carried on the front fenders.

   1905, Catalogs of Michigan-based Automobile Companies, number 4, page 30