Wiktionary英语词典
收录 1,329,381 个英语单词，来自Wiktionary的英文释义、IPA发音、词源、词形变化和词汇关系数据
R开头单词
(共59,864个)
plural of Radin
radio
英 /ˈɹeɪ.diˌəʊ/
The technology that allows for the transmission of sound or other signals by modulation of electroma...
To make make contact by radio at a destination before arriving there to let people there know one is...
A burglar alarm or fire alarm that transmits a warning radio signal when activated
A compact device that combines an alarm clock with a radio receiver, allowing the radio to activate ...
plural of radio alarm clock.
plural of radio alarm
Synonym of spelling alphabet.
plural of radio alphabet
An altimeter that uses a narrow radio or radar beam directed at the ground
plural of radio altimeter
A licensed person who practises radiocommunication on specially designated frequency bands as a hobb...
plural of radio amateur
Alternative form of radioamplifier.
plural of radio amplifier
A person who studies radio astronomy.
plural of radio astronomer
Of or relating to radio astronomy.
The branch of astronomy which studies celestial bodies and occurrences at radio frequencies by means...
A beacon that emits radio wave signals to guide ships or aircraft or to indicate the position of a s...