nonreactor

noun
non·​re·​ac·​tor | \ ˌnän-rē-ˈak-tər How to pronounce nonreactor (audio) \
plural nonreactors

Definition of nonreactor

: someone or something that does not react to a stimulus nonreactors in the placebo group

First Known Use of nonreactor

1903, in the meaning defined above

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The first known use of nonreactor was in 1903

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concealed or difficult to comprehend

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