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antifoggant

American  
[an-tee-fog-uhnt, -faw-guhnt, an-tahy-] / ˈæn tiˌfɒg ənt, -ˌfɔ gənt, ˌæn taɪ- /

noun

Photography.
  1. a chemical that prevents or minimizes fogging.


Etymology

Origin of antifoggant

antifog + -ant