That's useless. Nobody doesn't know what oil is. If there somehow is someone who doesn't know what oil is, they don't benefit from reading a dense scientific definition. For one, if they don't know "oil" then they definitely don't know nearly all of the words in that sentence. For another, there are countless better and easier ways to find out what oil is. If this were a Japanese term or a word not really used outside of hentai I would agree that a definition is the most useful description but defining an everyday word with dense scientific vernacular doesn't benefit anybody.

Hey, use the scientific statement like: "Oil is defined as any nonpolar chemical substance that is a viscous liquid at ambient temperatures and is both hydrophobic (immiscible with water) and lipophilic (miscible with other oils)."