• WordNet 3.6
    • adj seventieth the ordinal number of seventy in counting order
    • n seventieth position 70 in a countable series of things
    • ***
Webster's Revised Unabridged Dictionary
    • Seventieth Constituting or being one of seventy equal parts.
    • Seventieth Next in order after the sixty-ninth; as, a man in the seventieth year of his age.
    • Seventieth One next in order after the sixty-ninth.
    • Seventieth The quotient of a unit divided by seventy; one of seventy equal parts or fractions.
    • ***
Century Dictionary and Cyclopedia
    • seventieth Next in order after the sixtyninth: an ordinal numeral.
    • seventieth Constituting or being one of seventy parts into which a whole may be divided.
    • n seventieth One next in order after the sixty-ninth; the tenth after the sixtieth.
    • n seventieth The quotient of unity divided by seventy; one of seventy equal parts.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Seventieth last of seventy: the ordinal of 70
    • ***


Webster's Revised Unabridged Dictionary
AS. hund-seofontigoða,
Chambers's Twentieth Century Dictionary
A.S. seofontigseofon, seven; Dut. zeventig, Ger. siebenzig.


In literature:

"The Atlantic Monthly, Volume 14, No. 85, November, 1864" by Various
He had not quite completed his seventieth year.
"Wilmot and Tilley" by James Hannay
We are on our way to visit a friend, Mrs. Curtis, who lives on Seventieth Street near Fifth Avenue.
"Madge Morton's Victory" by Amy D.V. Chalmers
Zunz had passed his seventieth year when his "History of Synagogue Poetry" appeared.
"Jewish Literature and Other Essays" by Gustav Karpeles
At Hayes, after lingering a few weeks, he expired in his seventieth year.
"Critical and Historical Essays, Volume III (of 3)" by Thomas Babington Macaulay
It makes 'em awful mad if the place is out of order the seventieth part of an inch.
"Harper's Young People, March 2, 1880" by Various
Buckland's brigade next, the Forty-eighth, Seventieth, and Seventy-second Ohio.
"My Days and Nights on the Battle-Field" by Charles Carleton Coffin
Trimmer died, in her seventieth year, in 1810.
"Books and Authors" by Anonymous
He died about 1860, in the seventieth year of his age and the full odour of unpopularity.
"The Works of Robert Louis Stevenson - Swanston Edition Vol. 18 (of 25)" by Robert Louis Stevenson
The space between the sixty-ninth and the seventieth week is this present age.
"Studies in Prophecy" by Arno C. Gaebelein
Everything seemed new and strangely mysterious to me, although I had nearly attained my seventieth year.
"Waldfried" by Berthold Auerbach
To-day is my seventieth birthday.
"Edelweiss" by Berthold Auerbach
This is my seventieth birthday.
"Joseph in the Snow, and The Clockmaker" by Berthold Auerbach
When he was appointed Governor for the second time, in 1689, he was in his seventieth year.
"A Historical Geography of the British Colonies" by Charles Prestwood Lucas
The most active period of his life, as he has told us, was between his seventieth and eighty-second years.
"The True Benjamin Franklin" by Sydney George Fisher
He died of acute pneumonia, on the 17th of January, 1824, in the seventieth year of his age.
"The Canadian Portrait Gallery - Volume 3 (of 4)" by John Charles Dent
On November fifteenth, I had an invitation to a dinner given to Mark Twain on his seventieth birthday.
"All the Days of My Life: An Autobiography" by Amelia Edith Huddleston Barr
He died of gout in his seventieth year.
"The New Gresham Encyclopedia" by Various
Barley ripens even under the seventieth parallel of north latitude; wheat ceases at 64deg in Norway, 62deg in Sweden.
"The New Gresham Encyclopedia" by Various
It is the seventieth day of the siege.
"The Secrets of a Kuttite" by Edward O. Mousley

In poetry:

His laurels fresh from song and lay,
Romance, art, science, rich in all,
And young of heart, how dare we say
We keep his seventieth festival?
"Our Autocrat" by John Greenleaf Whittier

In news:

The Houston native celebrates his seventieth year on earth by publishing the twenty-sixth novel of his forty-year career.
Tuesday marks the seventieth anniversary of the sinking of the U.S.S.
Forty years ago this July, a few weeks before what would have been his seventieth birthday (on August 4), Louis Armstrong died of a heart attack in the brick shoebox house in Corona, Queens that is now a museum in his honor.
A Seventieth Birthday Celebration Concord Jazz.
In late February of this year, just as Colombia was preparing to celebrate his seventieth birthday on March 6, Gabriel García Márquez announced from his house in Cartagena that he would not be present for the occasion.
The 2012 holiday season is here and the chamber 's seventieth anniversary in 2013 is approaching.
Leonard died of lung cancer the day after Barack Obama was elected president last November, but his family waited until what would have been Leonard 's seventieth birthday to celebrate his life.
About a decade ago colleagues and former students of Avery Dulles published a volume in tribute to him on the occasion of his seventieth birthday.

In science:

Papers in honour of the seventieth birthday of Professor Heinrich Kleisli (Fribourg, 2000). J.
A generalization of Quillen's small object argument
Special issue in honor of Hyman Bass on his seventieth birthday.
Comparison of cobordism theories
Dedicated to Jos´e Pl´ınio Baptista on the occasion of his seventieth birthday. †Permanent address: Universidad Tecnol´ogica de Pereira, A.A. 97, La Julita, Pereira, Colombia.
General Relativity as a Genuine Connection Theory
Finite-dimensional motives and the conjectures of Beilinson and Murre Special issue in honor of Hyman Bass on his seventieth birthday.
Murre's conjectures and explicit Chow--Kuenneth projectors for some varieties