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• noun
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• 15 August 1945 (noun)
  1. the date of Allied victory over Japan, World War II
• 15 May Organization (noun)
  1. a terrorist organization formed in 1979 by a faction of the Popular Front for the Liberation of Palestine but disbanded in the 1980s when key members left to join a faction of al-Fatah
• 15 minutes (noun)
  1. a quarter of an hour
• August 15 (noun)
  1. celebration in the Roman Catholic Church of the Virgin Mary's being taken up into heaven when her earthly life ended; corresponds to the Dormition in the Eastern Orthodox Church
• atomic number 15 (noun)
  1. a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms
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