Pronunciation: (ā'tē thûrd'), [key]
1. next after the eighty-second; being the ordinal number for 83.
2. being one of 83 equal parts.
1. an eighty-third part, esp. of one (1/83).
2. the eighty-third member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.