What is the meaning of dark matter?

noun

  • Cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force. (.
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APAWordNet. (2010). dark matter. Retrieved September 22, 2026, from http://smartdefine.org/dark_matter/definitions/1247409
ChicagoWordNet. 2010. "dark matter" http://smartdefine.org/dark_matter/definitions/1247409 (accessed September 22, 2026).
HarvardWordNet 2010, dark matter, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/dark_matter/definitions/1247409>.
MLAWordNet. "dark matter" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/dark_matter/definitions/1247409>