from
The Collaborative International Dictionary of English v.0.48
Sexagesimal \Sex`a*ges"i*mal\, a. [Cf. F. sexag['e]simal.]
Pertaining to, or founded on, the number sixty.
[1913 Webster]
{Sexagesimal fractions} or {Sexagesimal numbers} (Arith. &
Alg.), those fractions whose denominators are some power
of sixty; as, 1/60, 1/3600, 1/216000; -- called also
{astronomical fractions}, because formerly there were no
others used in astronomical calculations.
{Sexagesimal arithmetic}, or {Sexagenary arithmetic}, the
method of computing by the sexagenary scale, or by
sixties.
{Sexagesimal scale} (Math.), the sexagenary scale.
[1913 Webster]