DICT.TW Dictionary Taiwan

 Ra-. A prefix, from the Latin re and ad combined, coming to us through the French and Italian. See Re-, and Ad-.
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 Ra
      n 1: an intensely radioactive metallic element that occurs in
           minute amounts in uranium ores [syn: radium, atomic
           number 88]
      2: (astronomy) the angular distance eastward along the
         celestial equator from the vernal equinox to the
         intersection of the hour circle that passes through the
         body; expressed in hours and minutes and second; used with
         declination to specify positions on the celestial sphere;
         "one hour of right ascension equals fifteen degrees" [syn:
          right ascension, celestial longitude]
      3: ancient hawk-headed Egyptian sun god; a universal creator
         [syn: Re]