violet layer

violet layer

[′vī·ə·lət ‚lā·ər]
(astronomy)
A layer of particles in the upper Martian atmosphere that scatter and absorb electromagnetic radiation at shorter wavelengths, making the atmosphere opaque to blue, violet, and ultraviolet light.
References in periodicals archive ?
4% ABV), an American wheat-style beer brewed to Belgian traditional methods, we discovered that its sharply bitter, lemon and Parma violet layers and touch of orange peel and coriander contrasts beautifully with asparagus' dense buttery, creamy flavours and unite in a formidable partnership.