petroleum geology petroleum geologist • petroleum grease · · · Info · Definitions · Characters · · petroleum geology · · Text Common · · Latin · · Scripts 17 · · Length 8 · · Syllables Definitions · · · (noun) the branch of economic geology that deals with the occurrence and exploitation of oil and gas fields. Synonyms: petroleum geology. · · Noun Definition 1 Characters · · space U+0020 e latin small letter e U+0065 g latin small letter g U+0067 l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079