Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en bitumen300012976natural bitumen Any of various solid or semisolid mixtures of hydrocarbons that occur in nature or that are obtained as residues from the distillation of petroleum or coal. For the blackish hydrocarbon portion of asphalt, use "asphaltic bitumen." betum betún 2026-03-30 20:31:41