The Collaborative International Dictionary
pisasphaltum
Pissasphalt \Pis"sas*phalt\, n. [L. pissasphaltus, Gr. ?; ? pitch + ? asphalt: cf. F. pissasphalte.] (Min.) Earth pitch; a soft, black bitumen of the consistency of tar, and of a strong smell. It is inflammable, and intermediate between petroleum and asphalt. [Written also pisasphaltum, pisasphalt, etc.]
Wiktionary
pisasphaltum
n. (alternative form of pissasphalt English)