Rn

Rn

The symbol for the element radon.

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Rn Chem radon

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RN

1. (in Canada and New Zealand) Registered Nurse

2. (in Britain) Royal Navy

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Rn

The symbol for radon.

Thesaurus

Noun	1.	Rn - 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 atomic number 86, radon chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter argonon, inert gas, noble gas - any of the chemically inert gaseous elements of the helium group in the periodic table
	2.	RN - a graduate nurse who has passed examinations for registration registered nurse nurse - one skilled in caring for young children or the sick (usually under the supervision of a physician) nurse-midwife - a registered nurse who has received special training as a midwife nurse clinician, nurse practitioner, NP - a registered nurse who has received special training and can perform many of the duties of a physician