schlieren
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schlie·ren
(shlîr′ən)pl.n.
1. Geology Irregular dark or light streaks in plutonic igneous rock that differ in composition from the principal mass.
2. Regions of a transparent medium, as of a flowing gas, that are visible because their densities are different from that of the bulk of the medium.
[German, pl. of Schliere, from dialectal Shliere, streaks, from Middle High German slier, mud, slime, from Old High German sclierrun, pieces, bits.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
schlieren
(ˈʃlɪərən)pl n, sing schliere
1. (General Physics) physics visible streaks produced in a transparent medium as a result of variations in the medium's density leading to variations in refractive index. They can be recorded by flash photography (schlieren photography)
2. (Geological Science) streaks or platelike masses of mineral in a rock mass, that differ in texture or composition from the main mass
[German, plural of Schliere streak]
ˈschlieric adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
schlie•ren
(ˈʃlɪər ən)n.pl.
1. streaks or irregularly shaped masses in an igneous rock that differ in texture or composition from the main mass.
2. Physics. visible streaks produced by density variations in a turbulent fluid.
[1885–90; < German, pl. of Schliere streak]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.