单词	acid radical
释义	acid radical noun 1 : the negative ion (as the sulfate ion SO4−−) of an acid : anion —now used especially by analysts 2 : a radical formed by removal of all hydroxyl or analogous groups (as mercapto) from an acid benzoyl C6H5CO− is the acid radical corresponding to benzoic acid C6H5COOH sulfuryl >SO2 is the acid radical of sulfuric acid H2SO4 compare acyl Word History First Known Use 1788, in the meaning defined at sense 1
随便看	relationless relations relationship relationships relatival relative relative adjective relative advantage relative adverb relative aperture relative bearing relative clause relative error relative frequency relative fugacity relative humidity relative impediment relative inclinometer relative index of refraction relative location relative motion relative personal equation relative pitch relative pronoun relative rank

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