schlieren


schlie·ren

noun plural \ˈshlir-ən\

Definition of SCHLIEREN

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
schlie·ric \ˈshlir-ik\ adjective

Origin of SCHLIEREN

German
First Known Use: 1898

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