What does ectoplasmic mean?
Ectoplasmic is an adjective describing anything relating to ectoplasm, a term with two distinct lives. In biology, it denotes the clear, relatively firm outermost layer of cytoplasm that surrounds the inner, granular endoplasm of cells such as amoebas, helping them hold their shape and move. In popular culture, however, the word is far better known from spiritualism: late nineteenth- and early twentieth-century mediums were said to produce a mysterious, often viscous substance — ectoplasm — from their bodies during séances, and anything resembling such a manifestation can be called ectoplasmic. Because fraudulent mediums were repeatedly exposed using cheesecloth and other props, the word now carries connotations of the spooky, the theatrical, and the faintly ridiculous. It is used both seriously in paranormal literature and playfully in fiction, most famously in films about ghost-hunting. Writers reach for it when they want something more vivid than merely 'ghostly'.
adjectiveRelating to or consisting of ectoplasm — either the outermost layer of cytoplasm in a cell, or the substance supposedly emanating from a medium's body during spiritualist phenomena.
- Of or relating to ectoplasm: the supposed vaporous or gelatinous substance said to be produced by spiritualist mediums during trances.
- Of or relating to the ectoplasm: the dense outer layer of cytoplasm in a cell.
"The medium's séance was famously exposed when investigators found the ectoplasmic apparition to be nothing more than gauze."
"Paranormal investigators photographed what they claimed was an ectoplasmic form rising from the armchair."
"The amoeba's ectoplasmic layer is firmer than its granular interior, giving the cell its shape as it moves."
The word that biologists coined for the skin of a cell became, thanks to Victorian séances, the word we now reach for whenever something looks ghostly and slimy at once.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ectoplasmic
The word derives from ectoplasm, coined in the nineteenth century from Greek elements: 'ektos' meaning 'outside' and 'plasma' meaning 'something moulded or formed'. Biologists first used it for the outer layer of a cell's cytoplasm, and spiritualists later borrowed the same term for the substance allegedly exuded by mediums. The adjectival form simply adds the standard suffix '-ic', and it shares its Greek roots with words such as plasma, protoplasm, and ectoderm.
Related word forms
How ectoplasmic is actually used
In modern scientific writing the word appears almost exclusively in cell biology; in everyday usage it carries strong supernatural or paranormal connotations, often with a slightly humorous or camp tone thanks to its association with ghost films like Ghostbusters.
Easily confused with ectoplasmic
Endoplasmic refers to the inner portion of the cell's cytoplasm, whereas ectoplasmic refers to the outer layer — they are anatomical opposites within the cell.