mediumistic

medium +‎ -istic

mediumistic (comparative more mediumistic, superlative most mediumistic)

1. Of or pertaining to mediums (people claiming to contact the dead); relating to or having the ability to communicate with spirits.
   • 1852, E. C. Rogers, Philosophy of Mysterious Agents, Human and Mundane, Boston: Redding, No. 1, p. 88,

     Fear of the world, fear of man individually, fear of loss of property or station, would all interfere, and prevent them from giving to their fellow-men, teachings, that their more receptive and mediumistic minds had been capable of receiving.

   • 1921, Arthur Conan Doyle, chapter 9, in The Wanderings of a Spiritualist‎, London: Hodder and Stoughton, pages 199–200:

     Mr. Michie’s wife is mediumistic and liable to be controlled. One day an entity came to her and spoke through her to her husband […]

   • 1959, Shirley Jackson, chapter 7, in The Haunting of Hill House, London: Michael Joseph, published 1960:

     I don’t imagine either of these young women has mediumistic gifts?

• mediumism