also: ウオータークロゼット
noun
A somewhat dated or technical term for a flush toilet; in everyday Japanese, トイレ or 便器 is more common.
この建物にはウォータークロゼットが設置されている。
This building is equipped with water closets.
Loanword from English 'water closet', a term for a flush toilet that was common in the 19th and early 20th centuries.