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Definition of Aerodynamic drag

Aerodynamic drag Definition from Science & Technology Dictionaries & Glossaries
Dictionary of Automotive Terms
The resistance of the air to forward movement, sometimes called air resistance . This is a factor of the shape of the vehicle ( drag coefficient and frontal area), the objects which stick out (i.e., mirrors, mufflers, bumpers ), the amount of turbulence at the rear of the vehicle, the nature of the vehicle's skin surface, and the amount of air going through the vehicle for cooling and ventilation. The faster you go, the greater the air friction (air friction = velocity x velocity). The faster you go, the greater the amount of power needed to overcome this drag (power = velocity x velocity x velocity).
Aerodynamic drag Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In aerodynamics, aerodynamic drag is the fluid drag force that acts on any moving solid body in the direction of the fluid freestream flow. From the body's perspective (near-field approach), the drag comes from forces due to pressure distributions over the body surface, symbolized , and forces due to skin friction, which is a result of viscosity, denoted . Alternatively, calculated from the flowfield perspective (far-field approach), the drag force comes from three natural phenomena: shock waves, vortex sheet, and viscosity.

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