柯林斯詞典petroleum /p??tr??l??m/ 1. N-UNCOUNT Petroleum is oil that is found under the surface of the earth or under the sea bed. Petrol and kerosene are obtained from petroleum. 石油 返回 petroleum劍橋詞典a dark , thick oil obtained from under the ground , from which various substances including petrol , paraffin , and diesel oil are produced 石油 範(fàn)例 Petrol and diesel are produced from petroleum.Products which are petroleum-based are highly inflammable .Petroleum is used to produce fuel for vehicles .'Vaseline ' is the commercial name for petroleum jelly .Petroleum jelly can be used to soothe and prevent nappy rash . 返回 petroleum