Sixtieth /(?)/

Six·ti·eth

Sixtieth

a.
  1. Next in order after the fifty-ninth.
  2. Constituting or being one one of sixty equal parts into which anything is divided.

Sixtieth

n.
  1. The quotient of a unit divided by sixty; one of sixty equal parts forming a whole.
  2. The next in order after the fifty-ninth; the tenth after the fiftieth.