There are 2 definitions of Rn in English:

Rn1

Syllabification: Rn

symbol

The chemical element radon.

Definition of Rn in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal

There are 2 definitions of Rn in English:

RN2

Syllabification: RN

abbreviation

1(Chiefly in North America) Registered Nurse.
1.1 (in the UK) Royal Navy.

Definition of Rn in: