The phrase "aerodynamic side" refers to the design of an object, like a car or an airplane, where one side is shaped in a way that helps it move more efficiently through the air. Full definition
These high performance crossovers are the recipients of an aggressive front bumper, a revised grille and aerodynamic side skirts. (auto.ndtv.com)
Additionally, MX - 5 Club is available with a package for $ 3,400 that equips it with forged, lightweight BBS 17 - inch wheels, Brembo ® front brake rotors and calipers with painted front and rear calipers, functional aerodynamic side sill extensions and rear bumper skirt. (topspeed.com)
Additional standard upgrades on 2018 Premium trims are Auto Up / Auto Down Driver's and Front Passenger Window with Anti-Pinch Protection, illuminated overhead console and front door pull handles and new more aerodynamic side mirrors. (motor1.com)