twenty-third
[ twen-tee-thurd, twuhn- ]
/ ˈtwɛn tiˈθɜrd, ˈtwʌn- /
adjective
next after the twenty-second; being the ordinal number for 23.
being one of 23 equal parts.
noun
a twenty-third part, especially of one (1/23).
the twenty-third member of a series.