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Comprehensive English-Chinese Dictionary

RA
  1. 1. Regular Army

Collins English-English Dictionary

RA
  1. 1. abbreviation for rear admiral
  2. 2. abbreviation for [astronomy] right ascension
  3. 3. abbreviation for (in Britain) Royal Academician or Academy
  4. 4. abbreviation for (in Britain) Royal Artillery
  5. 5. international car registration for Argentina (officially Argentine Republic)

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