Pronunciation: /ˈplænɪtɔɪd/
noun a celestial body that is smaller than a planet but larger than an asteroid
A1 A planetoid is a small celestial body that orbits the sun.
A2 Many astronomers believe that planetoids played a role in the formation of our solar system.
B1 Scientists have discovered a new planetoid in the outer reaches of our solar system.
B2 The planetoid known as Pluto was reclassified as a dwarf planet in 2006.
C1 Researchers are studying the composition of various planetoids to learn more about the early history of the solar system.
C2 The collision of two planetoids millions of years ago may have created the asteroid belt between Mars and Jupiter.
adjective describing something related to or resembling a planetoid
A1 The children learned about different planets in the solar system, including the planetoid Pluto.
A2 Scientists discovered a small planetoid orbiting a distant star.
B1 The spacecraft detected a planetoid in the asteroid belt between Mars and Jupiter.
B2 Astronomers are studying the composition of a planetoid that may have once been part of a larger planet.
C1 The researchers hypothesized that the planetoid's irregular shape was caused by a collision with another celestial body.
C2 The team of scientists embarked on a mission to explore the mysterious planetoid in the outer reaches of the galaxy.
formal A planetoid is a celestial body that is smaller than a planet but larger than an asteroid.
informal Did you know that Pluto is considered a planetoid?
slang That little planetoid looks like a baby planet!
figurative Her creativity is like a planetoid, small but powerful in its impact.
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