noun
Roman numerals
Refers to the numeral system using letters such as I, V, X, L, C, D, M. Used in contexts like clock faces, book chapter numbering, and historical dates.
時計の文字盤にはローマ数字が使われている。
Roman numerals are used on the clock face.
この本の章番号はローマ数字
The chapter numbers in this book are written in Roman numerals.