shale oil shale naphtha • shale spirit · · · Info · Definitions · Characters · · shale oil · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) oil extracted from oil shale by heating. Synonyms: shale oil. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F s latin small letter s U+0073