from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A trans-Neptunian Kuiper belt object that orbits the Sun in the same time period as Pluto, making exactly two orbits for every three orbits of Neptune.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy Any of several
planetoidsin the Kuiper Beltthat have orbitssimilar to Plutoin that they have a resonanceof 3:2 with that of Neptune
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
Just to further muddy the waters: there is already the term “plutino,” which refers to Kuiper Belt Objects which have orbits similar to Pluto’s that is, in the same 3:2 resonance with Neptune’s orbit.