In spec. uses. Chemistry. An element, compound, or radical having a combining power of four units, i.e. of four atoms of hydrogen; a tetravalent…
| 单词 | θ67469 |
| 释义 | the world > matter > chemistry > valency > [noun] > combining powers of elements > element with the power of four (1) tetrad1865 In spec. uses. Chemistry. An element, compound, or radical having a combining power of four units, i.e. of four atoms of hydrogen; a tetravalent… |
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