Seventieth

Part of speech: noun (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.

Part of speech: adjective (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.