SEXAGESIMAL Meaning of SEXAGESIMAL in English [ ˌsɛksə'dʒɛsɪm(ə)l ]■ adjective relating to or based on sixtieths.Derivatives~ly adverb OriginC17: from L. sexagesimus 'sixtieth' + -al . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004