SEXAGESIMAL Meaning of SEXAGESIMAL in English [sex.a.ges.i.mal] adj [L sexagesimus sixtieth, fr. sexaginta sixty] (1685): of, relating to, or based on the number 60 [2]sexagesimal n (1685): a sexagesimal fraction Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012