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Webster 1913 Edition
Twentieth
1.
Next in order after the nineteenth; tenth after the tenth; coming after nineteen others; – the ordinal of twenty.
2.
Constituting, or being, one of twenty equal parts into which anything is divided.
Twen′ti-eth
,Noun.
1.
The next in order after the nineteenth; one coming after nineteen others.
2.
The quotient of a unit divided by twenty; one of twenty equal parts of one whole.
Webster 1828 Edition
Twentieth
TWEN'TIETH
,Adj.