| NOUN | substance | dark matter | (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe |
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| Meaning | (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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| Category | cosmology, cosmogony, cosmogeny | The branch of astrophysics that studies the origin and evolution and structure of the universe |
| Parts | weakly interacting massive particle, WIMP | A hypothetical subatomic particle of large mass that interacts weakly with ordinary matter through gravitation |
| Broader | matter | That which has mass and occupies space |
| Spanish | materia oscura | |
| Catalan | matèria fosca | |
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