Sexagenary /(?)/

Sex·ag·e·na·ry

Sexagenary

a.
  1. Pertaining to, or designating, the number sixty; poceeding by sixties; sixty years old.

Phrases & Compounds
Sexagenary arithmetic
See under Sexagesimal.
Sexagenary scale
a scale of numbers in which the modulus is sixty. It is used in treating the divisions of the circle.

Sexagenary

n.
  1. Something composed of sixty parts or divisions.
  2. A sexagenarian.