A person who produces mediumistic phenomena of all kinds after entering a state of trance. Sometimes spelled “transmedium” by people who are stressing the idea of transcending normal reality and by people unfamiliar with the original concept.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...