petrolatum
nounA soft unctuous substance, consisting mainly of hydrocarbons of the paraffin series, obtained from residues left after the distillation of lighter oils from crude petroleum, or deposited from crude petroleum on standing.
nounA 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.
nouna smooth,
a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication