An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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exo-
  برون-  
borun- (#)
Fr.: exo-  

Prefix meaning “outside; outer; external” used in the formation of compound words: exoplanet, exosphere, exocentric.

Etymology (EN): From Gk. exo “outside,” used in forming scientific terms, → ex-.

Etymology (PE): Borun-, from borun “out, the outside” (Mid.Pers. bêron, from bê “outside, out, away”

  • rôn “side, direction;” Av. ravan- “(course of a) river”).