mediumistic

The positive and negative were well blent in me, and I was also "mediumistic."
Mystic London:|Charles Maurice Davies
We can get a large number of mediumistic phenomena with a light strong enough for us to distinguish things with certainty.
Mysterious Psychic Forces|Camille Flammarion
In very good mediumistic conditions the doubling is easy and the initial hyperæsthesia of short duration.
Mysterious Psychic Forces|Camille Flammarion
Professor Porro then sets forth the actual state of the question relating to mediumistic phenomena.
Mysterious Psychic Forces|Camille Flammarion

It behooves us before everything else positively to ascertain that mediumistic phenomena exist.
Mysterious Psychic Forces|Camille Flammarion

British Dictionary definitions for mediumistic

mediumistic

/ (ˌmiːdɪəˈmɪstɪk) /

adjective

of or relating to a spiritual medium

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