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Medical Term:


Pronunciation: nū′klē-ō-fil′, -fīl


  1. The electron pair donor atom in a chemical reaction in which a pair of electrons is picked up by an electrophil; any reagent or substance that is attracted to a region of low electron density.
  2. Relating to a nucleophil.

Synonym(s): nucleophilic1

[nucleo- + G. philos, fond]