Definition of dark matter
: nonluminous matter not yet directly detected by astronomers that is hypothesized to exist to account for various observed gravitational effects
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Recent Examples of dark matter from the Web
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This has caused some physicists to contemplate more complicated models of dark matter.
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The room-sized parallel computer will model our universe—from star formation to the distribution of dark matter—with more precision than ever before.
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Less joy came from digging through the dark matter and attempting to make some neat narrative from the many objects in this collection.
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The remaining quarter or so is made up of dark matter — invisible, untouchable stuff whose presence can only be felt by its gravitational influence on galactic scales.
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One class of hypothetical objects that might be dark matter do interact via the weak force, a phenomenon that also controls some sorts of radioactive decay.
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Observing these photons led to startling discoveries about our cosmos, from the Big Bang to the existence of dark matter.
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As its name suggests, dark matter is difficult to spot.
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The hypothetical building blocks of dark matter are called WIMPs, or weakly interacting massive particles.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dark matter.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of dark matter
1979
Learn More about dark matter
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See words that rhyme with dark matter Britannica.com: Encyclopedia article about dark matter
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