radiation
English Dictionary
->
Letter R
-> radiation
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radiation Definition
(n)
energy
that
is
radiated
or
transmitted
in
the
form
of
rays
or
waves
or
particles
(n)
the
act
of
spreading
outward
from
a
central
source
(n)
syndrome
resulting
from
exposure
to
ionizing
radiation
(
e
.
g
.,
exposure
to
radioactive
chemicals
or
to
nuclear
explosions
);
low
doses
cause
diarrhea
and
nausea
and
vomiting
and
sometimes
loss
of
hair
;
greater
exposure
can
cause
sterility
and
cataracts
and
(n)
the
spontaneous
emission
of
a
stream
of
particles
or
electromagnetic
rays
in
nuclear
decay
(n)
the
spread
of
a
group
of
organisms
into
new
habitats
(n)
a
radial
arrangement
of
nerve
fibers
connecting
different
parts
of
the
brain
(n) (
medicine
)
the
treatment
of
disease
(
especially
cancer
)
by
exposure
to
radiation
from
a
radioactive
substance
radiation Synonyms
actinotherapy
irradiation
radiation
radiation sickness
radiation syndrome
radiation therapy
radioactivity
radiotherapy
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