ulexite: Meaning and Definition of

u•lex•ite

Pronunciation: (y-lek'sīt), [key]
— n.
  1. a mineral, hydrous sodium and calcium borate, NaCaBO&multiplydot;8HO, occurring in arid regions in the form of white acicular crystals: a major source of borax.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.