Longman Dictionary of Contemporary English homepage

aerodynamic

 adjective
     
Related topics: Transport
aer‧o‧dy‧nam‧ic
1TT an aerodynamic car, design etc uses the principles of aerodynamics to achieve high speed or low use of petrol
2TT technical related to or involving aerodynamics:
aerodynamic efficiency
—aerodynamically adverb
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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