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(ˈstɜrn ʰwil, -ˌwil)

a paddle wheel at the stern of a vessel.
References in periodicals archive ?
The initial vessel was the iron sternwheel paddle steamer initially known as Gunboat No.
Prior to that, freight and passenger service to Mayo was only available on sternwheel steamboats in summer and horse-drawn sleighs in winter.
Calliope music will dance along Marietta's shore on the Ohio River September 10-12 for the annual Sternwheel Festival.
The new riverboat will be 20 feet longer and 20 feet wider than the current sternwheel style Par-A-Dice.
which operates steam-powered sternwheel riverboats for overnight cruises on the Ohio and Mississippi Rivers.