[], (Noun)

Definitions:
- A zone or layer in a transparent medium or material whose refractive index differs sufficiently from that of the surrounding medium or material to produce a noticeable deviation in the path taken by light passing through it.

- A linear or flattened mass in igneous rock which is slightly denser than its surroundings, has a diffuse boundary, and has typically been elongated by the flow of magma.


Phrases:

Origin:
mid 19th century; earliest use found in American Journal of Science. From German Schliere (feminine) irregular streak, stria, inferred singular from Middle High German schlieren, plural of schlier, schliere ulcer (Old High German scliero lump), further etymology unknown