"Wiper speed" refers to the adjustable speed at which the windshield wipers move back and forth to clean the windshield of a vehicle. It determines how fast or slow the wipers swipe across the glass to remove rain, snow, or dirt. Full definition
Even windshield wiper speed is adjusted from the monitor. (roadandtrack.com)
Not having an adjustable wiper speed in previous cars, this was definitely a plus. (autolist.com)
RAIN - SENSING WINDSHIELD WIPERS What they do: Comes on when rain starts, adjusting wiper speed as the intensity of rain changes. (articles.orlandosentinel.com)