Hovercar
From Memory Alpha, the free Star Trek reference
A hovercar is a vehicle that utilizes some form of gravity manipulating technology to "hover" over the ground, and drive through streets similar to Earth automobiles. They don't run on gasoline; instead, a new alternative was discovered in 2061. (ENT: "Carpenter Street") Tom Paris explained to Harry Kim that hovercars first came into general use on Earth in 2036. (VOY: "The 37's")
When Captain Archer was brought back ten months to his apartment by Daniels, he looked out his window into the city and saw hovercars flying by. (ENT: "Shockwave")
When Benjamin Sisko was about four years old, his biological mother, Sarah Sisko, who had left him and his family, died in a hovercraft accident in Australia. Joseph Sisko never told his son this until 2375. (DS9: "Image in the Sand")
In 2371, when the USS Voyager brought aboard an old automobile, Harry Kim mistook it for an early hovercar. (VOY: "The 37's")
