eightieth

[ ey-tee-ith ]

/ ˈeɪ ti ɪθ /

next after the seventy-ninth; being the ordinal number for 80.

being one of 80 equal parts.

an eightieth part, especially of one (1/80).

the eightieth member of a series.

Origin of eightieth

1350–1400; Middle English eightetithe, Old English ( hund)eahtatigotha eightieth. See eighty, -th²

It was not till his eightieth year that he made his first acquaintance with Greek literature.

Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 |Various
For many years previous to his death he lived at the homestead, dying there in his eightieth year, in the summer of 1912.

Our Friend John Burroughs |Clara Barrus
Fancy the Giaour pottering about in his eightieth year, and boasting that he could read small print without spectacles!

The Doctor's Wife |M. E. Braddon
With the arrival of his eightieth year, his activity and curiosity of intellect were certainly rather increased than abated.

Some Diversions of a Man of Letters |Edmund William Gosse

This is only one eightieth part of the quantity of peat sometimes found on the same area.

Man and Nature |George P. Marsh

eightieth

/ (ˈeɪtɪɪθ) /

(usually prenominal)

being the ordinal number of eighty in numbering or counting order, position, time, etc: often written 80th
(as noun)the eightieth in succession

the fraction equal to one divided by 80 (1/80)