Any of various natural,oily or greasy heat-sensitive substances,consisting of hydrocarbons or esters of fatty acids that are insoluble in water but soluble in most organic solvents.

• 蜡，几种天然油滑的热敏感物质之任一种，由不溶于水但溶于大多数有机溶剂的烃或脂肪酸酯构成。