radian
English Dictionary
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radian Definition
(n)
the
unit
of
plane
angle
adopted
under
the
Systeme
International
d
''
Unites
;
equal
to
the
angle
at
the
center
of
a
circle
subtended
by
an
arc
equal
in
length
to
the
radius
(
approximately
57
.
295
degrees
)
radian Synonyms
rad
radian
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