Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Biology The outer portion of the continuous phase of cytoplasm of a cell, sometimes distinguishable as a somewhat rigid, gelled layer beneath the cell membrane.
- n. The visible substance believed to emanate from the body of a spiritualistic medium during communication with the dead.
- n. An immaterial or ethereal substance, especially the transparent corporeal presence of a spirit or ghost.
Century Dictionary and Cyclopedia
- n. In zoology, the exterior protoplasm or sarcode of a cell; the ectosarc: applied to the denser exterior substance of infusorians and other unicellular organisms, or of a free protoplasmic body, as a zoöspore.
- n. In botany, the outer hyaline layer or film of the protoplasmic mass within a cell.
Wiktionary
- n. parapsychology The visible substance believed to emanate from the body of a spiritualistic medium during communication with the dead.
- n. parapsychology An immaterial or ethereal substance, especially the transparent corporeal presence of a spirit or ghost.
- n. cytology The outer granule-free layer of cytoplasm.
GNU Webster's 1913
- n. The outer transparent layer of protoplasm in a developing ovum.
- n. The outer hyaline layer of protoplasm in a vegetable cell.
- n. The ectosarc of protozoan.
WordNet 3.0
- n. the outer granule-free layer of cytoplasm
- n. (spiritualism) a substance supposed to emanate from the body of the medium during a trance
Etymologies
- ecto- + plasm (Wiktionary)
Examples
“Sir Arthur Conan Doyle, Sir Oliver Lodge, Dr. Schrenk-Notzing, Charles Richet (who coined the word ectoplasm) plus numerous other investigators worldwide spent extensive time and money analyzing the exploits of many channellers and mediums.”
“Most engineers are right-handed, and the brain ectoplasm seeps across into the writing: we find that “experimentalists” on the one hand, and “metrical-obsessives’, on the other (hand), are almost always right-handed.”
By the Numbers : Christian Bök : Harriet the Blog : The Poetry Foundation
“Eva C Carriere, a medium who had originally used her real name, Marthe Beraud, until she was exposed, claimed to be able to produce large quantities of a strange, otherworldly substance called ectoplasm, which was thought to be produced by the bioenergy of the spirits.”
“Or it may take the more material form of the exudation of a strange white evanescent dough-like substance called the ectoplasm, which has been frequently photographed by scientific enquirers in different stages of its evolution, and which seems to possess an inherent quality of shaping itself into parts or the whole of a body, beginning in a putty-like mould and ending in a resemblance to perfect human members.”
“Her historical wanderings unearth soul-seeking philosophers who rummaged through cadavers and calves 'heads, a North Carolina lawsuit that established legal precedence for ghosts, and the last surviving sample of "ectoplasm" in a Cambridge University archive.”
“Burroughs is fond too of the word "ectoplasm," and the beings that surround Lee, particularly the inimical ones, seem ectoplasmic phantoms projected on the wide screen of his consciousness from a mass séance.”
“You know that there was something like 100,000 Jewish survivors (scroll down to 1946) after world war two but that now there are 350,000 of them because they are reproducing through some kind of ectoplasm precipitation process.”
“(One of my sons considered "ectoplasm" the ugliest word he knew.)”
“ectoplasm" from his mouth-by carving words into corpses 'flesh, or, more precisely, by carving whole paragraphs of sinister nonsense that ran up and down their limbs and torsos, filled their cheeks and the backs of their hands.”
“When we hear accounts of “primitives” talking this way, we dismiss them as superstition because we interpret ghost or spirit as some sort of material ectoplasm, when in fact they may not mean any such thing at all.”
Lists
These user-created lists contain the word ‘ectoplasm’.
-
Substancestry
Mysterious and theoretical substances and "stuff" of legend. More emphasis on the ancient, mystical, mythical, folklore, mathematical, and scientific. I won't be listing too many "sci-fi" or comed...
ylem, ichor, aether, ectoplasm, impossible object, quark star, eucharist, pixie dust, eitr, elixir of life, philosopher's stone, alkahest and 126 more...
-
Interesting words
A list of words that are odd or words that I have looked up.
concupiscence, brize, scree, scoria, forestaff, spanaemia, valetudinarianism, distasture, pyrethrum, laudanum, gentian, bicameral and 11184 more...
-
Not 250 Spelling Words Again
Yet more spelling words for intermediate to advanced spellers.
ihi, kyoodle, heimin, feis, menarche, cordwainer, gherao, zythum, accidie, anastomosis, boustrophedon, oleum and 238 more...
-
science fact or fiction
pretty open-ended here—terms, ideas, lingo, technologies and phenomena (real or postulated) that are, were, should be or could be used in speculative fiction
tachyon, mecha, dropship, wetware, meatspace, nanobot, cloned meat, asteroid mining, hyperdrive, wormhole, parallel universe, distributed intel... and 464 more...
-
Steampunk
Words used quite often in steampunk
ansible, airship, chymical, valve, clockwork, dirigible, thaumaturgy, copper, bronze, difference engine, gear, rivets and 516 more...
-
Creepy Accretions
Substances that accumulate on the human body, whether we want them to or not.
smegma, toejam, earwax, dingleberries, fromunda cheese, cerumen, sleep, rheum, mucopurulent disc..., navel wool, dandruff, sweat and 9 more...
-
Ends in "-sm" but isn't an "ism"
pleonasm, prism, schism, orgasm, spasm, iconoclasm, chasm, enthusiasm, phantasm, ectoplasm, cytoplasm, aneurysm and 55 more...
-
Body bio- baby!
hemorrhage, prognosis, blowsabella, somatotype, ectomorphic, endomorphic, mesomorphic, labia minora, labia majora, entopic, ectopic, ectopic pregnancy and 65 more...
-
gre2
aberrant, aberration, aboveboard, abrasive, abstemious, acme, admonish, affable, affluent, alacrity, allegory, alleviate and 1901 more...
-
Cosmic
Relating to sci-fi or outer space.
xenophobia, tellurian, terrene, cislunar, ectoplasm, ufology, recalesce, panspermia, jetavator, siderism, exocide, sabaism and 10 more...
-
inquiryqueue's list
words delicious to pronounce
apostrophe, asphodel, anemone, cantaloupe, cantalevered, cardamom, coriander, petrichor, sycamore, luminous, tendril, peculiar and 122 more...
-
ecto-
outer, external
-
The Last Werewolf
This novel by Glen Duncan, aside from being a ripping yarn and beautifully written, is just littered with words that I had to look up and discover that often his use of the word not only fitted per...
gurns, bok, chimney breast, dichotomy, Platonic form, filthy, Platonic Form, mathematics, BAM, skirls, clarity, blundering and 298 more...
-
My Revised GRE Preparation List
Words from the new GRE : This list consists mostly of words from the book Magoosh-GRE-vocab-ebook, which is one of the best vocab materials available, especially if you have started preparing one ...
mulct, dupe, pittance, stipend, defray, cupidity, avarice, prodigal, profligate, affluent, insolvent, penurious and 533 more...
-
Just 'cause I like 'em, E
excoriate, exoskeleton, enclave, endemic, erstwhile, entwine, elliptical, élan, earflaps, earlobe, earthen, earthenware and 238 more...
-
haddock
bougre, sapajous, canailles, renégat, invertébré, iconoclaste, anthracite, mataf, cromagnons, djibouks, bourriques, illusionnistes and 128 more...
Tweets
Looking for tweets for ectoplasm.

Louises An armchair with stuffing coming out like ectoplasm. From "The Last Werewolf" by Glen Duncan.
Mar 27, 2012
filmbuff83 "He informed me that he was in the 'artistic game', and I gathered later that he was a photographer and had made the dim enlargement of Mrs. Wilson's mother which hovered like a ectoplasm on the wall." - F. Scott Fitzgerald (The Great Gatsby) Jun 13, 2008
abraxaszugzwang ''I am an invisible man. No, I am not a spook like those who haunted Edgar Allan Poe; nor am I one of your Hollywood-movie ectoplasms. I am a man of substance, of flesh and bone, fiber and liquids - and I might even be said to possess a mind. I am invisible, understand, simply because people refuse to see me.''
- Ralph Ellison (Invisible Man) Jan 21, 2007