Eightieth

Webster's Dictionary

(1): ( a.) Consisting of one of eighty equal parts or divisions.

(2): ( n.) The quotient of a unit divided by eighty; one of eighty equal parts.

(3): ( a.) The next in order after seventy-ninth.

King James Dictionary

Eightieth, a. 'atieth. from eighty. The next in order to the seventy ninth the eighth tenth.