rad

adjective
🔊/ræd/
🔊/ræd/
(especially North American English, old-fashioned, slang)
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  1. very good非常棒的;精彩的
    Word Origin1980s: probably an abbreviation of radical.

rad

noun
🔊/ræd/
🔊/ræd/
(physics物理)
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  1. a unit for measuring the effect of radiation拉德(辐射吸收剂量单位)
    Word Origin1980s: probably an abbreviation of radical.