phantastic

phantastic (comparative more phantastic, superlative most phantastic)

1. Alternative form of fantastic
   • 1916, chapter I, in Carl Gustav Jung, Beatrice M. Hinkle, transl., Psychology of the Unconscious, Moffat, Yard and Company, page 36:

     With this we affirm the important fact that man in his phantastic thinking has kept a condensation of the psychic history of his development. An extraordinarily important task, which even today is hardly possible, is to give a systematic description of phantastic thinking.

phantastic (plural phantastics)

1. (obsolete) Any hallucinogenic drug.