Meaning of PETROLATUM in English
noun a semisolid unctuous substance, neutral, and without taste or odor, derived from petroleum by distilling off the lighter portions and purifying the residue. it is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent. it is used as a bland protective dressing, and as a substitute for fatty materials in ointments.
Webster English vocab. Английский словарь Webster. 2012