petroleum jelly

Definition of petroleum jelly
National Cancer Institute

petroleum jelly

(peh-TROH-lee-um …)
A thick, greasy, substance with no odor or taste made from petroleum (mixture of oily liquids found in the earth). Petroleum jelly is used on the skin to prevent drying and to help heal scrapes and burns. It is also used as a base for some ointments. Also called petrolatum.

Source: NCI Dictionary of Cancer Terms