rebounder
n.— «The room also has a rebounder, a small trampoline used for stimulating the lymphatic system.» —“Create sacred spaces in home” by Mary Beth Breckenridge Akron Beacon Journal (Ohio) Jan. 30, 2009. (source: Double-Tongued Dictionary)
Further reading
We tend to take the index of a book for granted, but centuries ago, these helpful lists were viewed with suspicion. Some even worried that indexes would harm reading comprehension! A witty new book tells the story. Plus, the Latin term bona fides...
In Enough is Enuf: Our Failed Attempts to Make English Easier to Spell (Bookshop|Amazon), Gabe Henry recounts the story of the first national spelling bee in 1908, which some contestants had threatened to boycott because one of the contestants from...