1. Relating to or charged with negative electricity. 2. Referring to an element whose uncharged atoms have a tendency to ionize by adding electrons, thus becoming anions ( e.g., oxygen, fluorine, chlorine).
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elec·tro·neg·a·tive i-.lek-trō-'neg-ət-iv adj
1) charged with negative electricity
2) having a tendency to attract electrons
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elec·tro·neg·a·tive (e-lek″tro-negґə-tiv) bearing a negative electric charge.Medical dictionary. 2011.