spiritualism
n. US //ˈspɪɹɪˌtʃuəˌɫɪzm// UK //spˈɪɹɪtʃˌuːəlˌɪzəm// spir·i·tu·al·ism
From spiritual + -ism. In Allan Kardec's book The Spirits Book (1857) (Le Livre des Esprits in the original French), in which a distinction between spiritism and spiritualism is defined.