RN

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Rn \Rn\, noun (Chem.) the symbol for the chemical element {radon}. [PJC]

From WordNet (r) 3.0 (2006) [wn]:

Rn

noun

1: a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health [syn: {radon}, {Rn}, {atomic number 86}]

2: a graduate nurse who has passed examinations for registration [syn: {registered nurse}, {RN}]


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