(astronomy) An icy planetoid: an astronomical object, such as Pluto, Sedna or (for some authors) Ceres that is large enough to be a world and contains more ice than a typical asteroid.

(astronomy) A starlike object that contracts to about the volume of the planet Jupiter after its formation phase; its mass may range from several times that of Jupiter, such that it fuses deuterium, up to just below the threshold of sustained hydrogen fusion.

(astronomy) A small, relatively cool star of the main sequence; most stars in the Milky Way are red dwarfs.

plural of brown dwarf

(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).

A small European herbaceous perennial elder, species Sambucus ebulus.

Betula nana, a species of birch in the family Betulaceae, native to arctic and cool temperate regions of northern Europe, northern Asia and northern North America.

(astronomy) A star that is located in the main sequence in the Hertzsprung-Russell diagram; fuses hydrogen into helium in its core.

plural of dwarf birch

plural of dwarf spheroidal