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(Placename) a red planet-like object, roughly half the size of the Earth's moon, orbiting the sun but considerably beyond Pluto; discovered in 2003
[C21: after the Inuit goddess of the ocean]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
|Noun||1.||Sedna - a planetoid of rock and ice about three-quarters the size of Pluto discovered in 2003; the most distant object known to orbit around the sun|
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