nucleophile

adjective Chemistry.

1. of or relating to electron contribution in covalent bonding (opposed to electrophilic).

adjective

1. chem having or involving an affinity for positive charge. Nucleophilic reagents (nucleophiles) are molecules, atoms, and ions that behave as electron donorsCompare electrophilic

n.

1. A chemical compound or group that is attracted to nuclei and tends to donate or share electrons.