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in the PONS Dictionary

bi·tu·mi·nous [bɪˈtʃu:mɪnəs, Am -ˈtu:m-] ADJ

bituminous
bituminous
bituminous
bituminous coal
Steinkohle f <-, -n>
bituminous coal

bituminous coal [bɪˈtʃuːmɪnəs], hard coal, black coal N

bituminous coal

hard coal, bituminous coal, black coal N