[ ki-mer-i-kuhl, -meer-, kahy- ]
unreal; imaginary; visionary:
a chimerical terrestrial paradise.
wildly fanciful; highly unrealistic:
a chimerical plan.
See synonyms for chimerical on Thesaurus.com
"Let it not be said, that this power attributed to the English Parliament is chimerical."
THE DIPLOMATIC CORRESPONDENCE OF THE AMERICAN REVOLUTION, VOL. IV (OF 12) | VARIOUS