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Dark matter
Meaning
Noun
●
In Astronomy & Astrophysics:
Matter which cannot be
detected
by its
radiation
but whose
presence
is
inferred
from
gravitational
effects.
●
In Cosmology & Particle physics:
Matter which has
mass
but which does not
readily
interact
with
normal
matter
except through
gravitational
effects.
Sourced from
Wiktionary
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