r
English Dictionary
->
Letter R
-> r
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r Definition
(n)
a
unit
of
radiation
exposure
;
the
dose
of
ionizing
radiation
that
will
produce
1
electrostatic
unit
of
electricity
in
1
cc
of
dry
air
(n) (
physics
)
the
universal
constant
in
the
gas
equation
:
pressure
times
volume
=
R
times
temperature
;
equal
to
8
.
3143
joules
per
kelvin
per
mole
(n)
the
18th
letter
of
the
Roman
alphabet
(n)
the
length
of
a
line
segment
between
the
center
and
circumference
of
a
circle
or
sphere
r Synonyms
gas constant
r
radius
roentgen
universal gas constant
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