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[kee-moh-ster-uh-luh nt, kem-oh-] /ˌki moʊˈstɛr ə lənt, ˌkɛm oʊ-/
a chemical that causes an animal to become irreversibly sterile without changing its mating behavior or longevity.
1960-65; chemo- + sterilant Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Encyclopedia Article for chemosterilant

any chemical compound used to control economically destructive or disease-causing pests (usually insects) by causing temporary or permanent sterility of one or both of the sexes or preventing maturation of the young to a sexually functional adult stage. The mating of sterilized insects with fertile insects produces no offspring, and if the number of sterile insects is kept constant, the percentage of sterile insects will increase, and fewer young will be produced in each successive generation

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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