Quadricycle
From Tardis Wiki, the free Doctor Who reference
The Eleventh Doctor assembled a quadricycle in 2013 from parts he found in the Maintland family's garage, believing it to have been broken. When questioned by Clara Oswald, he realised that he had actually just invented it. (TV: The Bells of Saint John)
Behind the scenes
In the real world, the term "quadricycle" refers to early automobiles.
