schlieren: Meaning and Definition of


Pronunciation: (shlēr'un), [key]
— n. (used with a pl. v.)
  1. streaks or irregularly shaped masses in an igneous rock that differ in texture or composition from the main mass.
  2. the visible streaks in a turbulent, transparent fluid, each streak being a region that has a density and index of refraction differing from that of the greater part of the fluid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.