单词	superphosphate
释义	superphosphate noun su·​per·​phos·​phate ˌsü-pər-ˈfäs-ˌfāt  1 : an acid phosphate 2 : a soluble mixture of phosphates used as fertilizer and made from insoluble mineral phosphates by treatment with sulfuric acid Example Sentences Recent Examples on the Web Coprolites were sorted, washed, and transported by buggy, train, and canal barge to processing facilities, where they were milled and treated with acid to make superphosphate—the world’s first chemical fertilizer. Julia Rosen, The Atlantic, 8 Feb. 2021 Use superphosphate if squirrels have a tendency to dig in your beds. Kathy Huber, Houston Chronicle, 2 Feb. 2018 Mix a little bone meal or superphosphate in the soil around each tuber. Kathy Huber, Houston Chronicle, 2 Feb. 2018 Word History First Known Use 1798, in the meaning defined at sense 1
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