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IUPAC - µ- (mu) (M03659)

µ- (mu)

in inorganic nomenclature
https://doi.org/10.1351/goldbook.M03659
An affix used in names to signify that a group so designated bridges two or more centres of @C01329@.
Sources:
Blue Book, p. 465 [Terms] [Book]
Red Book, 3rd ed., p. 245 [Terms] [Book]