Twentieth
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( n.) The next in order after the nineteen; one coming after nineteen others.
(2): ( n.) The quotient of a unit divided by twenty; one of twenty equal parts of one whole.
(3): ( a.) Consisting, or being, one of twenty equal parts into which anything is divided.
(4): ( a.) Next in order after the nineteenth; tenth after the tenth; coming after nineteen others; - the ordinal of twenty.
King James Dictionary [2]
Twen'Tieth, a. The ordinal of twenty as the twentieth year.