English

Noun

double planet ‎(plural double planets)

1. a planet with a moon large enough to be considered a planet, were the planet not there, having a substantial portion of the system's overall mass.
2. a pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos, which in turn is in orbit about a star.
3. a pair of planemos in orbit around each other, where the barycenter of their orbits lies outside of both planemos.
4. a planemo with a moon large enough to be considered a planemo, having a substantial portion of the system's overall mass.