Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
electronegativity is a noun meaning "(chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond". It carries one recorded sense.
(chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond
chemistry
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for electronegativity come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.