There are 2 main definitions of Rn in English:

Rn1

Line breaks: Rn

symbol

The chemical element radon.

Definition of Rn in:

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There are 2 main definitions of Rn in English:

RN2

Line breaks: RN

abbreviation

1Niger (international vehicle registration).
[from French République du Niger]
1.1(Chiefly in North America) Registered Nurse.
1.2(In the UK) Royal Navy.

Definition of Rn in: