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ORR
Language
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See also:
orr
,
Orr
,
and
ǫrr
English
edit
Noun
edit
ORR
(
plural
ORRs
)
(
medicine
)
Initialism of
overall
response
rate
or
objective
response
rate
.
Proper noun
edit
ORR
Initialism of
Office of Rail and Road
, a non-ministerial government department in the
United Kingdom
.