adjective Physical Chemistry.
containing positive electricity; tending to migrate to the negative pole in electrolysis.
assuming positive potential when in contact with a dissimilar substance.
basic, as an element or group.

1840–50; electro- + positive

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World English Dictionary
electropositive (ɪˌlɛktrəʊˈpɒzɪtɪv)
1.  having a positive electric charge
2.  Compare electronegative (of an atom, group, molecule, etc) tending to release electrons and form positive ions or polarized bonds

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American Heritage
Science Dictionary
electropositive   (ĭ-lěk'trō-pŏz'ĭ-tĭv)  Pronunciation Key 
  1. Tending to donate electrons and to form a positive ion. Metals are generally electropositive.

  2. Having a positive electric charge.

  3. Capable of acting as a positive electrode.

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