单词 | humic acid |
释义 | humic acid in American English a brown powder consisting of organic acids, derived from humus humic acid in American Englishnoun a brown, melanin-tinted mixture of polymers, found in lignite, peat, and soils, where it acts as a cation exchange agent: used in drilling fluids and inks Word origin [1835–45]This word is first recorded in the period 1835–45. Other words that entered Englishat around the same time include: crosshead, daisy chain, grandstand, hot plate, squeegeeExamples of 'humic acid' in a sentence |
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