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.

• 石蜡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