n. A white mineral with triclinic crystals, NaCaB5O9·8H2O.
the GNU version of the Collaborative International Dictionary of English
n. A mineral occurring in white rounded crystalline masses. It is a hydrous borate of lime and soda.
The Century Dictionary and Cyclopedia
n. A hydrous borate of calcium and sodium, occurring in loose rounded masses with fibrous structure and white color. Also called boronatrocalcite, natroborocalcite.
Word Usage
"A ulexite student project led me to the work of Daniel Koon, an associate professor of physics at St. Lawrence University, New York."