phan·tasm
noun/ˈfæntæzəm/
/ˈfæntæzəm/
(formal)- a thing seen in the imagination
幻觉；幻影；幻想 Word OriginMiddle English (in the sense ‘deceptive appearance’): from Old French fantasme, via Latin from Greek phantasma, from phantazein ‘make visible’, from phainein ‘to show’. The change from f- to ph- in the 16th cent. was influenced by the Latin spelling.