Barbier may refer to:
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Barbier (surname)
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Barbier (crater), a feature on the Moon
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Barbier reaction
The Barbier reaction is an organometallic reaction between an alkyl halide (chloride, bromide, iodide), a carbonyl group and a metal. The reaction can be performed using magnesium, aluminium, zinc, indium, tin, samarium, barium or their salts. ...
, a reaction in organic chemistry
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Barbier's theorem in mathematics
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