Pronunciation: (fif'tē-sev'unth), [key]
1. next after the fifty-sixth; being the ordinal number for 57.
2. being one of 57 equal parts.
1. a fifty-seventh part, esp. of one (1/57).
2. the fifty-seventh member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.