A term usually used synonymously with elementary spirits, but sometimes given a special connotation by Spiritualists to indicate discarnate entities of a malicious nature. Theosophists use the word elemental to denote the "astral remains" or "shell" of one who has lived an evil life on Earth and who is loath to leave the scene of his pleasures. With some occultists, again, elemental really signifies a subhuman being, probably identical to an elementary spirit, but of a mental and moral status considerably lower than that of a human.
Lévi, Éliphas. Transcendental Magic. London: Redway, 1896. Reprint, New York: Samuel Weiser, 1970.