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.]
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.