Pis"sas*phalt (?), n. [L. pissasphaltus, Gr. &?;; &?; pitch + &?; asphalt: cf. F. pissasphalte.] (Min.) Earth pitch; a soft, black bitumen of the consistence of tar, and of a strong smell. It is inflammable, and intermediate between petroleum and asphalt. [Written also pisasphaltum, pisasphalt, etc.]