chemophobia
noun
che·mo·pho·bia
| \ -ˈfō-bē-ə
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Medical Definition of chemophobia
: abnormal or excessive fear of chemicals
Chemophobia, the unreasonable fear of chemicals, is a common public reaction to scientific or media reports suggesting that exposure to various environmental contaminants may pose a threat to health.— Stephen H. Safe, The New England Journal of Medicine, 30 Oct. 1997