fif•ti•ethPronunciation: (fif'tē-ith), [key]
next after the forty-ninth; being the ordinal number for 50.
being one of 50 equal parts.
a fiftieth part, esp. of one (1/50
the fiftieth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.