A device, person, or thing that diverts or redirects something from its original course or destination.
From 'divert' (verb, from Latin 'divertere') + '-er' (one who does the action or a device that does it). The term became common in engineering and technical contexts in the 20th century.
Stainless steel diverters on your shower valve are tiny examples of brilliant engineering—they seamlessly redirect water pressure using just a simple plunger, saving countless gallons annually.
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