The Collaborative International Dictionary of English v.0.48:

Aerodynamic \Aer`o*dy*nam"ic\, Aerodynamic
\A`["e]r*o*dy*nam"ic\, a.
   1. Pertaining to the force of air in motion.
      [1913 Webster]

   2. having a shape designed to minimize wind resistance
      (aerodynamic drag) when moving through the air or other
      gas; -- used especially of vehicles; as, the aerodynamic
      styling of an automobile.
      [PJC]

WordNet (r) 3.0 (2006):

aerodynamic
    adj 1: of or relating to aerodynamics
    2: designed or arranged to offer the least resistant to fluid
       flow; "a streamlined convertible" [syn: streamlined,
       aerodynamic, flowing, sleek]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "aerodynamic":
   aerial, aerographic, aerologic, aeromechanical, aerophysical,
   aerospace, aerostatic, aerotechnical, aery, air-conscious,
   air-minded, air-wise, airsick, airworthy, airy, aviational,
   ethereal, fuming, fumy, gaseous, gasified, gasiform, gaslike,
   gassy, mephitic, miasmal, miasmatic, miasmic, oxyacetylene,
   oxygenous, ozonic, pneumatic, pneumatological, reeking, reeky,
   smoking, smoky, steaming, steamy, vaporing, vaporish, vaporlike,
   vaporous, vapory