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phan·tasm 'fan-.taz-əm n
1) a figment of the imagination or disordered mind
2) an apparition of a living or dead person
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phan·tasm (fanґtaz-əm) [Gr. phantasma appearance] an impression or image not evoked by actual stimuli, and usually recognized as false by the observer; called also phantom. Cf. hallucination.Medical dictionary. 2011.