Pronunciation: (sev'un-tē-thûrd'), [key]
1. next after the seventy-second; being the ordinal number for 73.
2. being one of 73 equal parts.
1. a seventy-third part, esp. of one (1/73).
2. the seventy-third member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.