An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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compact H II region
  ناحیه‌ی ِ H IIی ِ همپک  
nâhiye-ye H II-ye hampak
Fr.: région H II compacte  

A Galactic H II region with an electron density ≥ 103 cm-3 and of a linear dimension ≤ 1 pc.

See also: → compact; → H II region.