\Twen"ti*eth\, a. [From {Twenty}; cf. AS. twentigo?a.
See {Twenty}.]
1. Next in order after the nineteenth; tenth after the tenth;
   coming after nineteen others; -- the ordinal of twenty.
2. Consisting, or being, one of twenty equal parts into which
   anything is divided.

\Twen"ti*eth\, n.
1. The next in order after the nineteen; one coming after
   nineteen others.
2. The quotient of a unit divided by twenty; one of twenty
   equal parts of one whole.