sev•en•ty-eighthPronunciation: (sev'un-tē-ātth', -āth'), [key]
next after the seventy-seventh; being the ordinal number for 78.
being one of 78 equal parts.
a seventy-eighth part, esp. of one (1/78
the seventy-eighth member of a series.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.