twen•ty-eighthPronunciation: (twen'tē-ātth', -āth', twun'-), [key]
next after the twenty-seventh; being the ordinal number for 28.
being one of 28 equal parts.
a twenty-eighth part, esp. of one (1/28
the twenty-eighth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.