" phantasmic "

[Noun]  | "phan*tasm" | \ ˈfan-ˌta-zəm \

1: a product of fantasy: such as

2: delusive appearance : illusion

3: ghost, specter

Origin: 13th century ;

 Middle English fantesme, fantosme, fantome, fantom "what has only a see:ming reality or value, vanity, illusion, apparition, falsehood," borrowed from Anglo-French fantosme, fantasme, fantesme, fantame (continental Old French fantosme), borrowed from Latin phantasma "ghost, apparition" (Late Latin also, "mental image, figment, illusion"), borrowed from Greek phántasma "apparition, ghost, vision, dream, (in plural) phenomena, portents," derivative, with the noun suffix -mat-, -ma, corresponding to phantázein "to make visible, present to the eye or mind, (middle voice) place before one's mind, picture to oneself, imagine" {mat|fantasy:1|};

  * Note : The Middle English word bifurcated into two phonetically distinct words in early Modern English, phantasm, which has mostly restored the form of the Latin etymon, and {phantom:1|phantom:1}, which more directly continues the Middle English original. According to a hypothesis in the Französisches etymologisches Wörterbuch, the -o- in the medieval French forms reflects *fantauma, from a presumed Ionian variant *phántagma of Greek phántasma that would have penetrated Gallo-Romance through contact with Greek speakers in Massilia (ancient Marseille). The -s- in fantosme, fantasme, etc., is an etymological restoration, as [s] would have been lost in such clusters in later medieval French.;

[Adjective]  | "phantasmic" 

[Noun]  | "phantasm"