In Greek mythology, a Phoenician princess abducted by Zeus in the form of a white bull (6)
I believe the answer is:
europa
(Other definitions for europa that I've seen before include "Satellite of Jupiter" , "A moon of Jupiter and Greek goddess" , "Girl carried off by Zeus disguised as a bull" , "The mother of King Minos of Crete and a moon of Jupiter" , "Minos's mother" .)