From Longman Dictionary of Contemporary Englishhetero-hetero- /hetərəʊ, -rə $ -roʊ, -rə/ prefix OPPOSITE/REVERSEother, opposite, differentheterosexual (=attracted to the opposite sex)
Examples from the Corpus
hetero-• a heterogeneous mixture• heterosexualOrigin hetero- Late Latin Greek, from heteros “different” 