Definition of Sedna in English:

Sedna

Syllabification: Sed·na
Pronunciation: /ˈsednə/

Entry from US English dictionary

Astronomy A reddish celestial body about half the size of earth’s moon. It is the most distant known object in the solar system and orbits the sun every 10,500 years.

Definition of Sedna in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose