Elaterite

noun

1. A brown-to-black, soft, elastic hydrocarbon resin.
2. An elastic mineral resin of a blackish-brown color, subtranslucent, and occurring in soft flexible masses. Also called elastic bitumen and mineral caoutchouc.
3. A mineral resin, of a blackish brown color, occurring in soft, flexible masses; -- called also mineral caoutchouc, and elastic bitumen.
4. The mineral wurtzilite.