English

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Etymology

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From ground +‎ -side.

Adverb

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groundside (not comparable)

  1. (science fiction) Towards or on the surface of a planet.
    Synonym: planetside
    • 1951 November, Paul W[arren] Fairman, “Proud Asteroid”, in Amazing Stories, volume 25, number 11, page 46:
      Even then she gave them quite a battle. It was like a pair of minnows landing a four-foot bass, but they hauled her down and booted her groundside with a skill that eventually got the two pilots a citation.

References

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