transitive verb
af·​ter·​treat | \ˈaf-tər-ˌtrēt\

Definition of aftertreat 

: to subject to aftertreatment

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First Known Use of aftertreat

1890, in the meaning defined above

History and Etymology for aftertreat

back-formation from aftertreatment

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The first known use of aftertreat was in 1890

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the figure or shape of a crescent moon

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