Scotland Yard (n.)youdaoicibaDictYouDict[Scotland Yard 词源字典]
used for "London Metropolitan Police," 1864, from the name of short street off Whitehall, London; where from 1829 to 1890 stood the headquarters of the Metropolitan Police Force, hence, the force itself, especially the detective branch. After 1890, located in "New Scotland Yard."[Scotland Yard etymology, Scotland Yard origin, 英语词源]