英文词源
- rad
- "x-ray dose unit," 1918, shortened form of radiation (q.v.). As shortened form of radical (n.), it is attested in political slang from 1820. Teen slang sense of "extraordinary, wonderful" is from late 1970s (see radical (adj.)).
中文词源
rad：非常好的，精彩的
俚语，缩写自 radical,激进的。
该词的英语词源请访问趣词词源英文版：rad 词源，rad 含义。
rad：拉德（辐射吸收剂量单位）
缩写自 radiation,辐射。