Definitions

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

  • n. A red to brownish-red mineral of the garnet group, Mn3Al2(SiO4)3.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. spessartine

from the GNU version of the Collaborative International Dictionary of English

  • n. A manganesian variety of garnet.

from The Century Dictionary and Cyclopedia

  • n. A manganesian variety of garnet.
  • n. In petrography, a name used by Rosenbusch (1895) for a variety of lamprophyre composed of hornblende and diopside with lime-soda feldspar. Occasionally orthoclase and olivin may be present. The variety is nearly the same as camptonite.

Etymologies

French, after Spessart, a hilly area of west-central Germany.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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