dark matter

Noun
  1. (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 (synset 114606400)
    referred to in: cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe
    is a type of: matter - that which has mass and occupies space
    has: weakly interacting massive particle, wimp - a hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation; postulated as a constituent of the dark matter of the universe

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