HEXADECIMAL
hexadecimal, hex
(adjective) of or pertaining to a number system having 16 as its base
Source: WordNet® 3.1
Etymology
Noun
hexadecimal (countable and uncountable, plural hexadecimals)
(arithmetic, computing, uncountable) A number system with base sixteen, using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F, most used in computing as a hexadecimal digit can represent four bits, half a standard byte.
(countable, computing) A number expressed in the hexadecimal system.
Synonyms
• (arithmetic, computing): base sixteen
• hex
• sexidecimal
• sexadecimal
Adjective
hexadecimal (not comparable)
Of a number, expressed in hexadecimal.
Synonyms
• (arithmetic, computing): base-sixteen
Source: Wiktionary