• Sednoid

    Origin

    Sedn(a) + -oid

    Full definition of sednoid

    Noun

    sednoid

    (plural sednoids)
    1. (astronomy) A trans-Neptunian object of the inner Oort cloud, that is, one with a perihelion greater than 75 AU.it could hint at a massive planet hiding in the inner Oort cloud whose gravity shepherds sednoids into similar orbits.
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