a solid plastic or pliable liquid substance,such as ozocerite or paraffin,originating from petroleum and found in rock layers and used in paper coating,as insulation,in crayons,and often in medicinal preparations

• 如地蜡或石蜡等来自原油的固态塑料状或可塑液态物质，发现于岩层中，用于纸的涂层如绝缘，蜡笔，还常用于医药制剂