| 单词 | pyrosulfuric acid |
| 释义 | pyrosulfuric acid in American English (ˌpaɪrəsʌlˈfjʊrɪkˈæsɪd) a strong, crystalline acid, H2S2O7, prepared commercially as a heavy, oily, fuming liquid: used in making explosives and dyes, as a sulfating agent, etc. Word origin pyro- + sulfuricpyrosulfuric acid in American Englishnoun Chemistry an oily, hygroscopic, corrosive liquid, H2S2O7, that, depending on purity, is colorless or dark brown: used chiefly as a dehydrating agent in the manufacture of explosives and as a sulfating or sulfonating agent in the manufacture of dyes Also called: fuming sulfuric acid, oleum Word origin [1870–75]This word is first recorded in the period 1870–75. Other words that entered Englishat around the same time include: Mafia, billing, fifth wheel, immobilize, washout |
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