An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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top-down structure formation
  دیسش ِ ساختار از بالا به پایین  
diseš-e sâxtâr az bâlâ bé pâyin
Fr.: formation des structures du haut vers le bas  

A cosmological model of → structure formation in which larger structures, such as galaxy → superclusters or perhaps even the vast → filaments and → voids, form earlier and then they fragment into smaller structures such as individual galaxies. Opposite of → bottom-up structure formation.

See also: → top; → down; → structure; → formation.