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bi 音标拼音: [b'ɑɪ] Bi n 1: a heavy brittle diamagnetic trivalent metallic element ( resembles arsenic and antimony chemically); usually recovered as a by- product from ores of other metals [ synonym: { bismuth}, { Bi}, { atomic number 83}] Deuto- \ Deu" to-\ or Deut- \ Deut-\ ( d[= u] t-)[ Contr. from Gr. dey` teros second.] ( Chem.) A prefix which formerly properly indicated the second in a regular series of compound in the series, and not to its composition, but which is now generally employed in the same sense as { bi-} or { di-}, although little used. [ 1913 Webster]
Bi- \ Bi-\ [ L. bis twice, which in composition drops the - s, akin to E. two. See { Bis-}, { Two}, and cf. { Di-}, { Dis-}.] [ 1913 Webster] 1. In most branches of science bi- in composition denotes two, twice, or doubly; as, bidentate, two- toothed; biternate, doubly ternate, etc. [ 1913 Webster] 2. ( Chem.) In the composition of chemical names bi- denotes two atoms, parts, or equivalents of that constituent to the name of which it is prefixed, to one of the other component, or that such constituent is present in double the ordinary proportion; as, bichromate, bisulphide. Be- and di- are often used interchangeably. [ 1913 Webster] |
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