What is british word for raincoat?

The British word for raincoat is "mackintosh" or "mac" for short, which is derived from the name of the Scottish chemist Charles Macintosh. In the early 19th century, Macintosh invented a waterproof fabric by bonding rubber to cloth, which was used to make raincoats. As a result, the term "mackintosh" became synonymous with raincoats in the United Kingdom. Today, the term is commonly used to refer to any type of waterproof coat or jacket.