Source : Webster's Revised Unabridged Dictionary (1913)

Aerodynamics \A`["e]r*o*dy*nam"ics\, n. [A["e]ro- + dynamics:
   cf. F. a['e]rodynamique.]
   The science which treats of the air and other gaseous bodies
   under the action of force, and of their mechanical effects.

Source : WordNet®

aerodynamics
     n : the branch of mechanics that deals with the motion of gases
         (especially air) and their effects on bodies in the flow
         [syn: {aeromechanics}]