A metallic element; atomic no. 83, atomic wt. 20.98037. Several of its salts are used in medicine; some contain BiO+, rather than Bi3+, and are called subsalts. The metal is used as an electron microscope stain for nucleic acids.
[Ger. Wismut, weisse Masse, white mass]
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Examples: glitazone, GI cocktail, etc.