aerodynamics
top: high drag on a less aerodynamic shape
bottom: low drag on a more aerodynamic shape
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

A simulation of an aircraft in wind tunnel used in the study of aerodynamics.
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