radaryoudaoicibaDictYouDict[radar 词源字典]
radar: see radio
[radar etymology, radar origin, 英语词源]
radar (n.)youdaoicibaDictYouDict
"electronic system for locating objects by means of radio waves," 1941, acronym (more or less) from radio detecting and ranging. The U.S. choice, it won out over British radiolocation. Figurative from 1950.