noun
: a factor representing the ratio of the aerodynamic drag acting especially on an airfoil to the product of the airspeed and the area of the airfoil
noun
: a factor representing the ratio of the aerodynamic drag acting especially on an airfoil to the product of the airspeed and the area of the airfoil
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012