Interstellar-planet meaning

(astronomy, planetology) A planetary-mass object which has either been ejected from its system or was never gravitationally bound to any star or other such object, and that therefore orbits the galaxy directly.
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Other Word Forms

Noun

Singular:
interstellar-planet
Plural:
interstellar-planets

Origin of interstellar-planet

  • Constructed from Latin: inter- +‎ stellar- +‎ planet and from Middle English planete, from Old English planēta (“planet, chasuble”), from Latin planeta, planetes, from Ancient Greek πλανήτης (planētēs) variant of πλάνης (planēs, “wanderer, planet”), from Ancient Greek πλανάω (planáō, “wander about, stray”), of unknown origin. Perhaps from a Proto-Indo-European *pel- (“to wander, roam”), cognate with Latin pālor (“wander about, stray”), Old Norse flana (“to rush about”), Norwegian flanta (“to wander about”). More at flaunt.

    From Wiktionary