aerodynamics

[air-oh-dahy-nam-iks]
noun (used with a singular verb)
the branch of mechanics that deals with the motion of air and other gases and with the effects of such motion on bodies in the medium. Compare aerostatics ( def 1 ).

Origin:
1830–40; aero- + dynamics

aerodynamic, aerodynamical, adjective
aerodynamically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aerodynamics (ˌɛərəʊdaɪˈnæmɪks)
 
n
(functioning as singular) Compare aerostatics the study of the dynamics of gases, esp of the forces acting on a body passing through air
 
aerody'namic
 
adj
 
aerody'namically
 
adv
 
aerody'namicist
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

aerodynamics
1837, from Gk. aero- "air" (comb. form) + dynamics (q.v.). Probably modeled on Fr. aérodynamique or Ger. aerodynamische.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
aerodynamics   (âr'ō-dī-nām'ĭks)  Pronunciation Key 
The study of the movement of air and other gases. Aerodynamics includes the study of the interactions of air with moving objects, such as airplanes, and of the effects of moving air on stationary objects, such as buildings.

Our Living Language  : The two primary forces in aerodynamics are lift and drag. Lift refers to (usually upward) forces perpendicular to the direction of motion of an object traveling through the air. For example, airplane wings are designed so that their movement through the air creates an area of low pressure above the wing and an area of high pressure beneath it; the pressure difference produces the lift needed for flight. This effect is typical of airfoil design. Drag forces are parallel and opposite to the object's direction of motion and are caused largely by friction. Large wings can create a significant amount of lift, but they do so with the expense of generating a great deal of drag. Spoilers that are extended on airplane wings upon the vehicle's landing exploit this tradeoff by making the wings capable of high lift even at low speeds; low landing speeds then still provide enough lift for a gentle touchdown. Aeronautical engineers need to take into account such factors as the speed and altitude at which their designs will fly (lower air pressures at high altitudes reduce both lift and drag) in order to optimally balance lift and drag in varying conditions.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

aerodynamics definition


The branch of science devoted to the study of the flow of gases around solid objects. It is especially important in the design of cars and airplanes, which move through the air.

Note: A vehicle that has been built to minimize friction with the air is said to be aerodynamically designed.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Finally, the large size of the crest may indicate that it played a part in
  aerodynamics.
The author needs to educate himself on the concept of aerodynamics.
But when he looked at the scientific literature he found that the aerodynamics
  of their fins had not been fully explored.
Not only can a coating of ice add significant weight to a plane, but it can
  also change the aerodynamics of the plane's airfoil.
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