Roman numerals are a numeral system which was used in Ancient Rome. It uses letters instead of numbers to represent values. You may have seen Roman numerals on clocks and on TV or film credits.

But the league doesn't use just any numbers. It uses Roman numerals, a rarely used counting system introduced thousands of ...

Some elements, particularly the transition metals, do not always have the same valency in their different compounds. The valency of these elements is usually given in roman numerals inside brackets.

Super Bowl week is back, which means Roman numerals are once again at the forefront of the public consciousness. As one of the only institutions that still uses Roman numerals, the NFL's choice ...