from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Tourmaline, especially black tourmaline.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The most common variety of tourmaline.
from the GNU version of the Collaborative International Dictionary of English
- n. Black tourmaline.
from The Century Dictionary and Cyclopedia
- n. A term used by early mineralogists to embrace a large group of crystallized minerals: later limited to common black tourmalin.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. black tourmaline
German Schörl.(American Heritage® Dictionary of the English Language, Fourth Edition)