from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A white, pale pink, or pale green crystalline mineral, essentially KCa4Si8O20(F,OH)·8H2O.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several forms of a pale pink or green mineral being a mixed fluoride and silicate of potassium and calcium.

from the GNU version of the Collaborative International Dictionary of English

  • n. A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. It is a hydrous silicate of calcium and potassium.

from The Century Dictionary and Cyclopedia

  • n. A mineral allied to the zeolites, occurring in laminated masses or in tetragonal crystals, and having a strong pearly luster on the surface of perfect cleavage, parallel to which it separates readily into thin laminæ.


Sorry, no etymologies found.



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