twen•ty-thirdPronunciation: (twen'tē-thûrd', twun'-), [key]
next after the twenty-second; being the ordinal number for 23.
being one of 23 equal parts.
a twenty-third part, esp. of one (1/23
the twenty-third member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.