streamlined

[streem-lahynd]
adjective
1.
having a contour designed to offer the least possible resistance to a current of air, water, etc.; optimally shaped for motion or conductivity.
2.
designed or organized to give maximum efficiency; compact.
3.
modernized; up-to-date.

Origin:
1890–95; streamline + -ed2

unstreamlined, adjective
Dictionary.com Unabridged

streamline

[streem-lahyn]
noun
1.
a teardrop line of contour offering the least possible resistance to a current of air, water, etc.
2.
the path of a particle that is flowing steadily and without turbulence in a fluid past an object.
verb (used with object), streamlined, streamlining.
3.
to make streamlined.
4.
to alter in order to make more efficient or simple.
adjective

Origin:
1870–75; stream + line1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
streamline (ˈstriːmˌlaɪn)
 
n
1.  a contour on a body that offers the minimum resistance to a gas or liquid flowing around it
2.  an imaginary line in a fluid such that the tangent at any point indicates the direction of the velocity of a particle of the fluid at that point
 
vb
3.  to make streamlined

streamlined (ˈstriːmˌlaɪnd)
 
adj
1.  offering or designed to offer the minimum resistance to the flow of a gas or liquid
2.  made more efficient, esp by simplifying

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

streamline
1868 (n.) "line drawn from point to point, so that its direction is everywhere that of the motion of the fluid" [Lamb, "Hydrodynamics," 1906], from stream + line. The adj. is attested from 1898, "free from turbulence," 1907 in sense of "shaped so
that the flow around it is smooth." The verb is attested from 1913 with meaning "give a streamline form to," and 1936 in the extended sense of "simplify and organize."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
streamline   (strēm'līn')  Pronunciation Key 
To construct or reconstruct an object to reduce the amount of drag it undergoes as it moves through a fluid, especially air or water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

streamline definition


The line traced by a liquid or gas as it moves. Streamlines are most commonly used in describing the flow of a liquid or gas around a solid object.

Note: A “streamlined” design is one in which objects that move through a gas or liquid are shaped to match these lines, and therefore reduce the energy required to produce that motion.
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
No matter how sleek and streamlined the aircraft, the human pilot couldn't put
  out enough power.
With a streamlined, brushed-for-softness waistband and a sleek, contoured fit.
Streamlined and strong-boned, they're proficient submariners.
They come home and receive the same ceremonies that the ancients did, but
  they've been streamlined somewhat.
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