Pronunciation: (thûr'tē-ith), [key]
1. next after the twenty-ninth; being the ordinal number for 30.
2. being one of 30 equal parts.
1. a thirtieth part, esp. of one (1/30).
2. the thirtieth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.