The phrase "oily substance" refers to a liquid or material that is greasy, slippery, and has a smooth texture like oil.
Sentences with «oily substance»
We often wonder where they went and how they got that strange oily substance all over their coats. (shearpets.com)
It turns out that this particular yeast breaks down sebum (a waxy, oily substance secreted from the skin) and then consumes the fatty acids found in sebum. (megangarcia.com)
Using a dry microfiber cloth will actually pick up more dust and keep your furniture from becoming clouded or built - up with oily substances. (thespruce.com)