Definition of nucleophile in US English:

nucleophile

noun

Chemistry
  • A molecule or substance that has a tendency to donate electrons or react at electron-poor sites such as protons.

    ‘nucleophiles are produced in the formation of acids and bases’

Pronunciation

nucleophile

/ˈn(j)uklioʊˌfaɪl//ˈn(y)o͞oklēōˌfīl/