HEXADECIMAL Meaning of HEXADECIMAL in English [ ˌhɛksə'dɛsɪm(ə)l ]■ adjective Computing relating to or using a system of numerical notation that has 16 rather than 10 as its base.Derivatives~ly adverb Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004