from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A brown-to-black, soft, elastic hydrocarbon resin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The mineral wurtzilite.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral resin, of a blackish brown color, occurring in soft, flexible masses; -- called also mineral caoutchouc, and elastic bitumen.
from The Century Dictionary and Cyclopedia
- n. An elastic mineral resin of a blackish-brown color, subtranslucent, and occurring in soft flexible masses. Also called elastic bitumen and mineral caoutchouc.
Asphalts and bitumens include a wide variety of hydrocarbon materials, such as gilsonite, grahamite, elaterite, ozokerite, etc., which are used for somewhat different purposes.