Rn

英 [ˌɑːr'en] 美 [ˌɑːr'en]

• abbr. [化]元素氡的符号（=radon）
• RN.
• abbr. 无线电导航(Radio Navigation)
• abbr. 注册护士(Registered Nurse)
• abbr. 皇家海军(Royal Navy)

英英释义

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

2. a graduate nurse who has passed examinations for registration

近反义词

【近义词】

• registered nurse 有证书的护士...
• radon 氡