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Definition or meaning of the English word Bi-
In most branches of science bi- in composition denotes two; twice; or doubly; as; bidentate; two-toothed; biternate; doubly ternate; etc. ().
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 ().