SAT Word of the Day – chimerical
chimerical – (adj) fantastically visionary or improbable; imaginary
synonyms – imaginary (also chimeric), fabulous, fanciful, fantasied, fantastic (also fantastical), fictional, fictitious, ideal, imaginal, imagined, invented, made-up, make-believe, mythical (or mythic), notional, phantasmal, phantasmic, phantom, pretend, unreal, visonary