- pertaining to or based upon the number 60.
- a fraction whose denominator is 60 or a power of 60.
- relating to or based on the number 60sexagesimal measurement of angles
- a fraction in which the denominator is some power of 60; a sixtieth
adj.“pertaining to 60,” 1680s, from Medieval Latin sexagesimalis, from Latin sexagesimus “the sixtieth,” from sexaginta “sixty.”