- small streaks or masses in igneous rocks, differing in composition from the main rock but blending gradually into it
- Optics regions in a translucent medium, as a fluid, that have a different density and consequently a different index of refraction than the medium and that can be photographed as shadows produced by the refraction of light passed through these regions
Origin of schlierenGer, literally , streaks; akin to slur
- Geology Irregular dark or light streaks in plutonic igneous rock that differ in composition from the principal mass.
- 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.
Origin of schlierenGerman, pl. of Schliere, from dialectal Shliere, streaks, from Middle High German slier, mud, slime, from Old High German sclierrun, pieces, bits.