WC is an abbreviation that stands for "water closet". It is a term used to refer to a toilet or a room containing a toilet. The term "water closet" was used in the 1900s for a toilet, due to most being fitted in a spare closet or cupboard. Over time, WC has been used instead of bathroom to describe a room with a toilet but no bath. The term "WC suite" refers to a complete toilet system, including a cistern, pan, and flush.