Exo-

//ɛksoʊ-// prefix

Definitions

Prefix
  1. 1
    outside; external morpheme
  2. 2
    outside; external; extrasolar; beyond the Solar System (our solar system) morpheme

    "exo- + planet → exoplanet"

Etymology

From Ancient Greek ἔξω (éxō, “outer; external”).

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