Pronunciation: (hek"su-des'u-mul),[key] —adj.Computers,Math. 1. Also,hex.of or pertaining to a numbering system that uses 16 as the radix, employing the numerals 0 through 9 and representing digits greater than 9 with the letters A through F.
2. relating to or encoded in a hexadecimal system, esp. for use by a digital computer.