Last Updated：2025/12/07
(cosmology) The epoch of recombination of the Universe, where atomic matter formed from free particles, combining protons with electrons. One of the Ages of the Universe. The cosmic era when neutral hydrogen formed out of the cosmic soup of protons and electrons in plasma, that condensed out of the energy of the Big Bang. This era produces the Cosmic Microwave Background (CMB).
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Recombination
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Source Word
Recombination
Proper noun
(cosmology)
The
epoch
of
recombination
of
the
Universe,
where
atomic
matter
formed
from
free
particles,
combining
protons
with
electrons.
One
of
the
Ages
of
the
Universe.
The
cosmic
era
when
neutral
hydrogen
formed
out
of
the
cosmic
soup
of
protons
and
electrons
in
plasma,
that
condensed
out
of
the
energy
of
the
Big
Bang.
This
era
produces
the
Cosmic
Microwave
Background
(CMB).
Japanese Meaning
宇宙再結合期：宇宙進化の一エポックで、プラズマ状態の自由な粒子（陽子と電子）が結合して中性原子が形成され、宇宙が透明になり、宇宙背景放射（CMB）が生じた時代を指す。
Sense（1）
(cosmology)
The
epoch
of
recombination
of
the
Universe,
where
atomic
matter
formed
from
free
particles,
combining
protons
with
electrons.
One
of
the
Ages
of
the
Universe.
The
cosmic
era
when
neutral
hydrogen
formed
out
of
the
cosmic
soup
of
protons
and
electrons
in
plasma,
that
condensed
out
of
the
energy
of
the
Big
Bang.
This
era
produces
the
Cosmic
Microwave
Background
(CMB).
