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

  • n. See sillimanite.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Sillimanite.

from the GNU version of the Collaborative International Dictionary of English

  • n. A silicate of alumina, of fibrous or columnar structure. It is like andalusite in composition; -- called also sillimanite, and bucholizite.

from The Century Dictionary and Cyclopedia

  • n. A mineral of a white or gray color and fibrous to columnar structure.


From its fibrous crystals.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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