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trans-Neptunian object. In DICTIOUS you will not only get to know all the dictionary meanings for the word
trans-Neptunian object, but we will also tell you about its etymology, its characteristics and you will know how to say
trans-Neptunian object in singular and plural. Everything you need to know about the word
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English
Noun
trans-Neptunian object (plural trans-Neptunian objects)
- (astronomy) Any natural object (usually a minor planet (asteroid) or a hypothetical planet) in the Solar System with all or most of its orbit outside the orbit of Neptune.
- Synonym: (initialism) TNO
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