Lewis acid


Lew·​is acid ˈlü-əs- How to pronounce Lewis acid (audio)
: a substance that is capable of accepting an unshared pair of electrons from a base to form a covalent bond

Examples of Lewis acid in a Sentence

Recent Examples on the Web However, superacids—as their name suggests—are even stronger than the strongest Lewis acid, which is antimony pentafluoride (SbF5). Darren Orf, Popular Mechanics, 2 Mar. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'Lewis acid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Gilbert N. Lewis †1946 American chemist

First Known Use

1944, in the meaning defined above

Time Traveler
The first known use of Lewis acid was in 1944

Dictionary Entries Near Lewis acid

Cite this Entry

“Lewis acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Lewis%20acid. Accessed 30 May. 2024.

More from Merriam-Webster on Lewis acid

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!