odyssey

Main Entry: od·ys·sey
Pronunciation: 'ä-d&-sE
Function: noun
Inflected Form(s): plural -seys
Etymology: the Odyssey, epic poem attributed to Homer recounting the long wanderings of Odysseus
1 : a long wandering or voyage usually marked by many changes of fortune
2 : an intellectual or spiritual wandering or quest

-- http://www.m-w.com/cgi-bin/dictionary?va=odyssey

yes, i ♥ 2001: a space odyssey.