The group of small bodies that circle round the Sun, outside the orbit of Mars, are known under the designation of the planetoids.

Numbering of the Planetoids or Asteroidal Planets.—In numbering the planetoids a difficulty has arisen …

1979, Tsunami generation by pelagic planetoid impact:

if one can argue for the early existence of a few largely molten planetoids with dimension of kilometers or tens of kilometers, one can quite as easily argue for very large numbers of such planetoids.

1991, Optimal trajectories for an ion driven spacecraft from earth to the planetoid Vesta:

After discovering "planetoids", bodies orbiting the Sun, even larger than Pluto's moon Charon ... the question of how Sedna and other planetoids came to be.

Eris … was the upstart planetoid that knocked Pluto off the planetary lists

We prefer the word "planetoid" as a new word to describe round objects orbiting the sun.

A dwarf planet or a planetoid is a celestial body that …

'Dwarf planet' is a dumb phrase. For years we've called things like Pluto and Xena 'planetoids'—planetlike.

Planetoid

Meaning

Noun

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