from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A red to brownish-red mineral of the garnet group, Mn3Al2(SiO4)3.
from The Century Dictionary.
- noun A manganesian variety of garnet.
- noun 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.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A manganesian variety of garnet.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
from The American Heritage® Dictionary of the English Language, 4th Edition
[French, after Spessart, a hilly area of west-central Germany.]
"spessartine," or "spessartite," from the district in which it is chiefly found, though its distribution is a fairly wide one.