GNU Collaborative International Dictionary of English
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Found one definition
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Electro-negative, Electronegative (?), a. (Chem. & Physics)
1. Having the property of being attracted by an electro-positive body, or a tendency to pass to the positive pole in electrolysis, by the law that opposite electricities attract each other. Contrasted with neutral and electropositive
[1913 Webster]
2. Negative; nonmetallic; acidic; -- opposed to positive, metallic, or basic.
[1913 Webster]
3. (Physics) carrying a negative electrical charge.
[PJC]
4. (Chem. and Physics) having a tendency to take up electrons and form negative ions; having a relatively positive electrode potential.
[WordNet 1.5 +PJC]