| 1. | registered nurse. |
| 2. | British. Royal Navy. |
| a graduate nurse who has passed a state board examination and been registered and licensed to practice nursing. Abbreviation: R.N. |
ra·don  (rā'dŏn)  n. Symbol Rn A colorless, radioactive, inert gaseous element formed by the radioactive decay of radium. It is used as a radiation source in radiotherapy and to produce neutrons for research. Its most stable isotope is Rn 222 with a half-life of 3.82 days. Atomic number 86; melting point -71°C; boiling point -61.8°C; specific gravity (solid) 4. See Table at element. [rad(ium) + -on2.] |
| registered nurse n. Abbr. RN A graduate trained nurse who has passed a state registration examination and has been licensed to practice nursing. |
| Rn The symbol for the element radon. |
| RN abbr.
|
registered nurse reg·is·tered nurse (rěj'ĭ-stərd)
n.
Abbr. RN, R.N. A nurse who has graduated from an accredited school of nursing and has been registered and licensed to practice by a state authority.
Rn
The symbol for the element radon.
RN or R.N.
abbr.
registered nurse
| radon (rā'dŏn) Pronunciation Key
Symbol Rn A colorless, odorless, radioactive element in the noble gas group. It is produced by the radioactive decay of radium and occurs in minute amounts in soil, rocks, and the air near the ground. Radon is used as a source of radiation for the treatment of cancer and other diseases. Its most stable isotope is Rn 222 with a half-life of 3.82 days. Atomic number 86; melting point -71°C; boiling point -61.8°C; specific gravity (solid) 4. See Periodic Table. |
| Rn
The symbol for radon. |
| rn Kirundi |
| Rn radon |
RN
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