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Etymology edit

multi- +‎ planetary

Adjective edit

multiplanetary (not comparable)

  1. Consisting of multiple planets.
    • 2016, Priyamvada Natarajan, Mapping the Heavens: The Radical Scientific Ideas That Reveal the Cosmos[1]:
      As of November 10, 2015, more than 5,000 exoplanets have been discovered, some of them in the 484 known multiplanetary systems.