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Quaoar

[ kwäə-wär′ ]
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A Kuiper belt object that, with a diameter of about 1,288 km (800 mi), is the largest such object so far discovered. Quaoar is approximately the size of Charon, Pluto's moon, and has a nearly circular orbit at a distance of some 1.6 billion km (1 billion mi) beyond that of Pluto.
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Which of the following nouns has an irregular plural form?
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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