Did you perhaps mean monohull?
- mono- + wheel (Wiktionary)
“If you like that half-shredded look that's in these days, the monowheel might be your ticket to high fashion … if you have a high pain threshold.”
“The items on top of the Snell-Hitchcock cake are an Easter Island statue, a vending machine, and a monowheel, all items we built in previous years.”
“UPDATE: Thanks to the many many many South Park fans who point out that in the episode The Entity, Mr. Garrison invented his own monowheel called IT.”
“Over the years the myth of the monowheel has become an equal fascination.”
“This site has an amazing history of past and present efforts to build a monowheel vehicle.”
“Embrio, Bombardier's new concept monowheel -- balanced by gyros -- is pretty cool looking, and like all good vaporware vehicles, it is powered by magic hydrogen fuel-cells.”
“The robot's dual monowheel design provides nimble 360º movement as it moves between accessories-you can control it from up to 30′ away.”
“We're talking 'bout this here monowheel, one of the nuttiest vehicular contraptions we've ever seen.”
“There was also a steam-powered monowheel in the Japanese Anime,”
“I know you remember these happy fellas who drove around the Bird's Nest Stadium in those colorful monowheel cycles.”
Looking for tweets for monowheel.