Noah Webster
Seventieth
SEV'ENTIETH, adjective [from seventy.] The ordinal of seventy; as a man in the seventieth year of his age. The seventieth year begins immediately after the close of the sixth-ninth.
SEV'ENTIETH, adjective [from seventy.] The ordinal of seventy; as a man in the seventieth year of his age. The seventieth year begins immediately after the close of the sixth-ninth.