RNR

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RNR stands for:

Northern Rhodesia , now Zambia, former license plate
Royal Naval Reserve , Royal Navy reserve units

Rnr stands for:

Ribonucleotide reductase

rnr stands for:

Nari-Nari (ISO-639-3 code), extinct Australian language in the southern area of the Murrumbidgee River , New South Wales, variety of Wemba Wemba