noun. the outer granule-free layer of cytoplasm.
noun. (spiritualism) a substance supposed to emanate from the body of the medium during a trance.
1. Noun, singular or mass The ectoplasm is the gel-like substance on the outer portion of the cytoplasm of a cell. 2. Foreign word Carry the green silly string, and use it as the Slimer's ectoplasm"" aria-label="Link to "ectoplasm""> "ectoplasm."