Arene is a term used in organic chemistry to describe a hydrocarbon ring structure that contains at least one double bond, typically derived from benzene. There are several synonyms for the term arene, including aromatic hydrocarbon, benzenoid hydrocarbon, and cyclic polydiene. Aromatic hydrocarbons are characterized by their pleasant odors and highly stable structures, making them useful for a variety of industrial applications. Benzenoid hydrocarbons are derived from the benzene molecule and include compounds like toluene, xylene, and styrene. Cyclic polydienes are similar in structure to arenes but may contain more than one double bond in the ring. Regardless of the synonym used, these compounds play a vital role in the chemistry of many industries.