Pronunciation: (fif'tē fifth' or, often, -fith'), [key]
1. next after the fifty-fourth; being the ordinal number for 55.
2. being one of 55 equal parts.
1. a fifty-fifth part, esp. of one (1/55).
2. the fifty-fifth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.