non·​re·​ac·​tor ˌnän-rē-ˈak-tər How to pronounce nonreactor (audio)
plural nonreactors
: someone or something that does not react to a stimulus
nonreactors in the placebo group

Word History

First Known Use

1903, in the meaning defined above

Time Traveler
The first known use of nonreactor was in 1903

Dictionary Entries Near nonreactor

Cite this Entry

“Nonreactor.” Dictionary, Merriam-Webster, Accessed 18 May. 2024.

Love words? Need even more definitions?

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