schlieren
plural noun
schlie·ren
ˈshlir-ən 
1
: small masses or streaks in an igneous rock that differ in composition from the main body
2
: regions of varying refraction in a transparent medium often caused by pressure or temperature differences and detectable especially by photographing the passage of a beam of light
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All images were taken at 8000 frames per second, using schlieren photography.
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Discover Magazine, 15 May 2013
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Discover Magazine, 15 May 2013
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“Schlieren.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/schlieren. Accessed 4 Nov. 2025.
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