ECTOPLASM By N., Pam M.S. - April 7, 2013 1.The dense cytoplasm seen at the periphery of a cell. 2. The substance that is supposed to be seen around a medium during a seance. Also called teleplasm. See materialisation. ECTOPLASM: "Ectoplasm is a dense cytoplasm found at the edges of cells." Related Psychology Terms ENDOPLASM GERM PLASM MEDIUM CELL DIVISION CELL BODY NUCLEOPLASM ION CHANNEL TYPE III CELL CELL-CELL INTERACTIONS NEUROFIBRIL Cite this page: N., Pam M.S., "ECTOPLASM," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/ectoplasm/ (accessed May 8, 2021).