Meaning of white alkali

white' al'kali

Pronunciation: [key]
  1. a whitish layer of mineral salts, esp. sodium sulfate, sodium chloride, and magnesium sulfate, often occurring on top of soils where rainfall is low.
  2. refined soda ash.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.