A variant spelling of 'diluter'; something that dilutes or a device used for diluting.
An alternative or older English spelling of 'diluter,' using the Latin agent suffix pattern '-tor' instead of '-er.' Both derive from 'dilute' and Latin 'diluere.'
The variation between 'diluter' and 'dilutor' shows English's long obsession with Latin—we borrowed both the '-er' and '-tor' agent suffixes from different sources, creating twins that mean the same thing.
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