SEDNA

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

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

Classified under:

Nouns denoting natural objects (not man-made)

Instance hypernyms:

minor planet; planetoid (any of numerous small celestial bodies that move around the sun)

Credits