- (astronomy) A world-like planetoid of the Solar system, that is smaller than the classical planets. More specifically, any astronomical body which has a geology defined by hydrostatic equilibrium (and thus has taken the shape a body of water would take, as opposed to a small Solar System body), orbits the Sun (as opposed to a moon), and does not gravitationally dominate other bodies near its orbit (as opposed to a classical planet or, in IAU usage, as opposed to a planet).
- double dwarf planet
- (Inner Solar System): Ceres
- (Outer Solar System): Eris, Pluto, possibly also Haumea, Makemake, Gonggong, Quaoar, Orcus, Salacia, Sedna
a type of celestial body
- (most likely dwarf planets of the Solar System) Ceres, Orcus, Pluto, Haumea, Quaoar, Makemake, Gonggong, Eris, Sedna