rollator
n.— «His sister-in-law commented that older people in Sweden sustain their stamina by walking behind a so-called rollator. Unlike a conventional “clomp and stomp” walker, a rollator glides over pavement, carpet, thresholds and grass on large rubber wheels—much like a shopping cart with brakes, but without a big basket.» —“A New Rolling Walker To Get the Frail Moving Lacks Market Traction” by Thomas Petzinger Jr. in Pittsburgh, Pa. Wall Street Journal (B1) Oct. 2, 1998. (source: Double-Tongued Dictionary)
Further reading
There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...
One of the celestial bodies listed in The Dictionary of Minor Planet Names(Amazon) is called Sumaura. It’s the name of the oldest private elementary school in Kobe, Japan, and was suggested by the discoverer’s son. This is part of a...