dark light

English

Etymology 1

Blend of dark matter +‎ light. From being a force found in the dark sector that acts on dark matter, analog to light in the "light sector" (the part of the universe that is not part of the dark sector) that acts on "light matter" (ordinary matter that interacts electromagnetically, thus visibly).

Noun

dark light (uncountable)

1. (astrophysics, cosmology, astronomy, physics) A hypothetical force of nature that acts on dark matter to allow dark matter to interact with itself.

See also

• dark energy
• dark matter
• dark sector

Etymology 2

From dark +‎ light; dark being like black, "dark" being a metaphor for the invisible (non-visible light).

Noun

dark light (plural dark lights)

1. (slang) Synonym of black light (ultraviolet light)