an·​ti·​feed·​ant | \¦an-ˌtī-¦fē-dᵊnt, ¦an-tē-\
plural antifeedants

Definition of antifeedant 

: a natural or synthetic substance that stops or inhibits feeding by a pest and especially an insect … pesticides derived from plants such as the neem tree, which act as antifeedants and repellents.— Sheila Daar, A New Look at Vegetables, Spring 1993

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First Known Use of antifeedant

1969, in the meaning defined above

History and Etymology for antifeedant

anti- entry 1 + feed entry 1 + -ant entry 1

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The first known use of antifeedant was in 1969

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to express warning or disapproval

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