Meaning of PETROLATUM in English

PETROLATUM

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.