An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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vacuum
  خلاء  
xala' (#)
Fr.: vide  
  1. A space completely empty of matter but not achievable in practice on Earth.
  2. A state of lowest energy in a → quantum field theory.

Etymology (EN): L. vacuum “an empty space, void,” noun use of neuter of vacuus “empty,” related to vacare “to be empty.”

Etymology (PE): Xala’ loan from Ar.