ra

Noun
  1. is a type of: metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
    substance meronym: uranium ore - any ore from which uranium can be extracted
    same as: atomic number 88, radium
  2. referred to in: antiquity - the historic period preceding the Middle Ages in Europe
    is an instance of: egyptian deity - a deity worshipped by the ancient Egyptians
    same as: re
  3. referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
    is a type of: angular distance - the angular separation between two objects as perceived by an observer
    same as: celestial longitude, right ascension

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