aether
Obsolete space-filler
Aether is an archaic or poetic spelling of ether.
In classical and medieval thought, aether was the pure, luminous substance filling the upper regions of space beyond the terrestrial sphere—the fifth element, distinct from earth, air, fire, and water.
Nineteenth-century physics proposed a luminiferous aether as the medium through which light waves traveled, a concept abandoned after experiments failed to detect it.
The spelling persists in fantasy and science fiction to evoke cosmic or mystical qualities: The ship sailed through the aether between worlds.
Orderly totality of existence
- heavensCelestial expanse overhead
- firmamentThe arching sky above
- empyreanCelestial sphere above
- celestial sphereImaginary dome of stars
starlight · void · interstellar · luminiferous · space · astronomy · orbital · cosmic
Transmitting or producing light
- mediumMiddle size or state
- lightVisible electromagnetic radiation
- EinsteinByword for genius
- relativityHow observers differ
obsolete · classical · electromagnetic · vacuum · transmission · vibration · Newton · Maxwell
Purest embodiment of something
- philosopher's stoneLegendary substance enabling transmutation
- transmutationComplete change of form
- elixirMythical healing draught
- panaceaUniversal cure
hermeticism · sublimation · purification · esoteric · occult · arcane · elemental · fifth element
Not physically present
- incorporealNot made of matter
- gossamerFilmy, delicate material
- vaporousLike a gas, diffuse
- wispyThin and insubstantial
insubstantial · rarefied · diaphanous · delicate · weightless · airy · tenuous · subtle
cosmos
Orderly totality of existence
celestial sphere · starlight · void · interstellar · luminiferous · space · astronomy · orbital · cosmic · nebula
luminiferous
Transmitting or producing light
relativity · obsolete · classical · electromagnetic · vacuum · transmission · vibration · Newton · Maxwell · Victorian
quintessence
Purest embodiment of something
- philosopher's stoneLegendary substance enabling transmutation
- transmutationComplete change of form
- elixirMythical healing draught
panacea · hermeticism · sublimation · purification · esoteric · occult · arcane · elemental · fifth element · distillation
intangible
Not physically present
- incorporealNot made of matter
- gossamerFilmy, delicate material
- vaporousLike a gas, diffuse
wispy · insubstantial · rarefied · diaphanous · delicate · weightless · airy · tenuous · subtle · impalpable
primordial
Existing from the start
- ChaosOriginal emptiness before creation
- ErebusPersonified primordial darkness
- UranusSideways-spinning outer world
Greek · personification · deity · cosmogony · creation · Titans · Olympus · divine · ancient · gods
- Science Historyscientific revolution, natural philosophy, scientific method, scientific journals, Royal Society
- Ancient Cosmologycosmic egg, cosmic ocean, world tree, axis mundi, firmament
- arcane substancesphilosopher's stone, elixir of life, quintessence, phlogiston, aqua regia
- classical elementsearth, air, fire, water, quintessence
- magic energymana, aura, chi, qi, prana
- magical substancesmana, ichor, ambrosia, nectar, elixir
aethervacuum
Absence of matter
void · emptiness · nothingness · empty space · the void
ethereal, petroleum ether, ether, ethers, ethereally, etherealness