phantăsĭa (noun F) = φαντασία:
* An idea, notion, fancy (post-Aug.): Nicetas longe disertius hanc phantasiam movit,Sen. Suas. 2, 15: cor tuum phantasias patitur,Vulg. Ecclus. 34, 6.—As a term of reproach: phantasia, non homo, a mere notion or fancy, the mere semblance of a man, Petr. 38 fin. (in Cic. Ac. 1, 11, 40; 2, 6, 8 al., written as Greek, and translated visum).
* A phantom, apparition: (animus) colli-git visa nocturna, quas phantasias nos adpellamus,Amm. 14, 11, 18.

s. TLL