pluton
n.— «If the ideas are approved at the general meeting of the IAU in Prague next week, schoolchildren will, in future, have to learn that the solar system has 12 planets: eight classical ones that dominate the system—Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune and Uranus—and four in a new category called plutons. These are Pluto, its moon Charon, a spherical asteroid that sits between Mars and Jupiter called Ceres, and an object called 2003 UB313 but nicknamed Xena by American astronomers who found it.» —“Pluto survives as solar system acquires three more planets” by Alok Jha Guardian (United Kingdom) Aug. 16, 2006. (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...
In addition to the eight planets in our solar system, there are also more than a million minor planets, including five so-called dwarf planets, plus hundreds of thousands of asteroids. When an astronomer or amateur stargazer discovers one, they get...
You mean there’s already another meaning for “pluton.” Certainly there can be more than one, can’t there?
Note that the word “pluton” already exists — it is a term in geology.