From Longman Dictionary of Contemporary EnglishRelated topics: Computershexadecimalhex‧a‧dec‧i‧mal /ˌheksəˈdesəməl◂/ (also hex) adjective technicalhexadecimal numbers are based on the number 16 and are mainly used on computersExamples from the Corpushexadecimal• For example, the followingprogram looks at each character in a string and checks that it is a validhexadecimal numeric character.Originhexadecimal(1900-2000)hexa-"six" (from Greek, from hex"six") + decimal