séance (English)

...While spirit mediumship itself has a very long history, those who are usually called mediums are those who have had the ability since the modern spiritualist movement that arose in the mid-19th century in America. A meeting in which one encounters the phenomena caused by a medium is called a sitting or séance, but with very few exceptions, physical mediums only conduct their séances in the dark. For this reason, they are difficult to study scientifically, and while many have been exposed as fraudulent, there are many whose credibility is unclear.

*Some of the terminology that mentions "séance" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…霊媒術自体は歴史的にきわめて古いが，通常，霊媒と呼ばれるのは，19世紀中葉アメリカに興った近代心霊主義運動以後の能力者である。霊媒の起こす現象に接する会を交(降)霊会sitting,séanceというが，物理的霊媒では，ごく少数の例外を除くと，暗黒中でのみ交霊会を行う。そのため科学的研究の対象となりにくく，欺術の暴露された者も多いが，信憑性の不明の者も多い。…

※「séance」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報