eight•y-ninthPronunciation: (ā'tē nīnth'), [key]
next after the eighty-eighth; being the ordinal number for 89.
being one of 89 equal parts.
an eighty-ninth part, esp. of one (1/89
the eighty-ninth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.