planemo n. an object in outer space with mass insufficient to achieve fusion but large enough to be made roughly spherical by its own gravity. Editorial Note: This term and meaning were derived by way of determining what characteristics, exactly, should constitute a planet. Etymological Note: Coined by Gibor Basri from planetary mass object. (source: Double-Tongued Dictionary)
Further reading
The edge of the Grand Canyon. A remote mountaintop. A medieval cathedral. Some places are so mystical you feel like you’re close to another dimension of space and time. There’s a term for such locales: thin places. And: did you ever go...
Astronomers have spotted nearly 150 objects far out in space that are too small to be called stars, but they can’t be called planets, because they don’t orbit a star. They’re about the size of Jupiter, but given what we know about...