plural nonreactors
Definition of nonreactor
: someone or something that does not react to a stimulus
nonreactors in the placebo group
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share nonreactor
Time Traveler for nonreactor
The first known use of nonreactor was in 1903
See more words from the same year