Lewis base

noun

, Chemistry.

1. any substance capable of forming a covalent bond with an acid by transferring a pair of electrons to it.

Lewis base

noun

1. a substance capable of donating a pair of electrons to an acid to form a covalent bond Compare Lewis acid

Word History and Origins

Origin of Lewis base¹

First recorded in 1960–65; named after G. N. Lewis

Word History and Origins

Origin of Lewis base¹

C20: named after G. N. Lewis (1875–1946), US chemist