Pronunciation: (siks'tē-siksth'), [key]
1. next after the sixty-fifth; being the ordinal number for 66.
2. being one of 66 equal parts.
1. a sixty-sixth part, esp. of one (1/66).
2. the sixty-sixth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.