An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
helium II
  هلیوم II  
heliom II
Fr.: hélium II  

  1. A → superfluid, colder component of → liquid helium (4He), occurring when → helium I is cooled below the → lambda point.

    1. In stellar and interstellar plasma spectroscopy, ionized helium.

See also: → helium.