Pronunciation: (siks'tē-ātth', -āth'), [key]
1. next after the sixty-seventh; being the ordinal number for 68.
2. being one of 68 equal parts.
1. a sixty-eighth part, esp. of one (1/68).
2. the sixty-eighth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.