Seventieth /(?)/

Sev·en·ti·eth

Seventieth

a.
  1. Next in order after the sixty-ninth; as, a man in the seventieth year of his age.
  2. Constituting or being one of seventy equal parts.

Seventieth

n.
  1. One next in order after the sixty-ninth.
  2. The quotient of a unit divided by seventy; one of seventy equal parts or fractions.