The Collaborative International Dictionary
Cogitable
Cogitable \Cog"i*ta*ble\, a. [L. cogitabilis, fr. cogitare to think.] Capable of being brought before the mind as a thought or idea; conceivable; thinkable.
Creation is cogitable by us only as a putting forth of
divine power.
--Sir W.
Hamilton.
Wiktionary
cogitable
a. thinkable, conceivable, able to be imagined.
WordNet
cogitable
adj. possible to ponder; "space flight to other galaxies becomes more cogitable" [syn: ponderable]