dysodile

Century Dictionary and Cyclopedia

1. n. A kind of greenish- or yellowish-gray coal occurring in masses made up of foliaceous layers, which when burning emits a very fetid odor. It is a product of the decomposition of combined vegetable and animal matters. It was first observed at Melili in Sicily, and has also been found at several places in Germany and France.

Wiktionary

1. n. mineralogy An impure earthy or coaly bitumen, which emits a highly foetid odour when burning.

GNU Webster's 1913

1. n. (Min.) An impure earthy or coaly bitumen, which emits a highly fetid odor when burning.