Petrolatum (noun)

A semi-solid mixture of hydrocarbons, obtained from petroleum, used as a lubricant, ointment base, and insulator.

Origin:

Late 19th century: from petroleum + -atum (suffix denoting a substance) + -um (suffix forming nouns).

Examples:

1. Petrolatum was used to lubricate machinery in the factory.
2. Petrolatum was the main ingredient in the medicinal ointment used to treat the patient's skin condition.
3. Petrolatum was used as a barrier to protect the electrical wiring from moisture.
4. Petrolatum was commonly used as a moisturizer in skin and hair care products.
5. Petrolatum was added to the ink to make it smoother and easier to apply.