The term "cxl" is actually an abbreviation in Roman numerals, representing the number 140. Roman numerals are a system of numbers that originated in ancient Rome, using combinations of letters from the Latin alphabet (I, V, X, L, C, D, M) to signify values.
"CXL" is a Roman numeral for 140. You will typically see it in contexts related to history, literature, or specific numbering systems.