Wheel
From Tardis Wiki, the free Doctor Who reference
The wheel was an invention in humanity's early history, used for transportation. The Silents claimed to have watched humans on Earth since the wheel and the fire. (TV: Day of the Moon)
When Ian Chesterton expressed his bewilderment at the First Doctor's description of his police box-shaped home as a "ship", the Doctor sarcastically told him that "this doesn't roll along on wheels, you know." (TV: An Unearthly Child)
