dwarf planet

noun

: a celestial body that orbits the sun and has a spherical shape but is not large enough to disturb other objects from its orbit

Examples of dwarf planet in a Sentence

Recent Examples on the Web
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On the other hand, the carbon monoxide ice could also point to someplace like the outskirts of a system like ours; at 3.7 billion miles away from the Sun, dwarf planet Pluto’s surface temperature ranges from -375° to -400° Fahrenheit, and there is carbon monoxide ice on its surface. Kiona N. Smith, Forbes.com, 11 July 2025 As for the second astrological transit, the transformational dwarf planet Pluto is squaring the needle Pluto, and also making a square. Lisa Stardust, People.com, 3 July 2025 This decision, made years before the International Astronomical Union (IAU) officially reclassified Pluto as a dwarf planet in 2006, sparked a deluge of criticism. Sharmila Kuthunur, Space.com, 23 June 2025 It was renamed a dwarf planet in 2006 by the International Astronomical Union because of its size and that other planets may cross its orbit. Sara Novak, Discover Magazine, 23 June 2025 See All Example Sentences for dwarf planet

Word History

First Known Use

1993, in the meaning defined above

Time Traveler
The first known use of dwarf planet was in 1993

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Cite this Entry

“Dwarf planet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dwarf%20planet. Accessed 8 Aug. 2025.

Kids Definition

dwarf planet

noun
: a celestial object similar to a planet but too small to clear other objects from its orbit
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