Individual #Greek_alphabet  the alphabet used by ancient Greeks
  instance of:  #alphabet
  member:  #alpha  the 1st letter of the Greek alphabet
  member:  #beta  the 2nd letter of the Greek alphabet
  member:  #gamma  the 3rd letter of the Greek alphabet
  member:  #delta.letter_of_the_alphabet  the 4th letter of the Greek alphabet
  member:  #epsilon  the 5th letter of the Greek alphabet
  member:  #zeta  the 6th letter of the Greek alphabet
  member:  #eta  the 7th letter of the Greek alphabet
  member:  #theta  the 8th letter of the Greek alphabet
  member:  #iota  the 9th letter of the Greek alphabet
  member:  #kappa  the 10th letter of the Greek alphabet
  member:  #lambda.letter_of_the_alphabet  the 11th letter of the Greek alphabet
  member:  #mu  the 12th letter of the Greek alphabet
  member:  #nu  the 13th letter of the Greek alphabet
  member:  #xi  the 14th letter of the Greek alphabet
  member:  #omicron  the 15th letter of the Greek alphabet
  member:  #pi  the 16th letter of the Greek alphabet
  member:  #rho  the 17th letter of the Greek alphabet
  member:  #sigma  the 18th letter of the Greek alphabet
  member:  #tau  the 19th letter of the Greek alphabet
  member:  #upsilon  the 20th letter of the Greek alphabet
  member:  #phi  the 21st letter of the Greek alphabet
  member:  #chi  the 22nd letter of the Greek alphabet
  member:  #psi  the 23rd letter of the Greek alphabet
  member:  #omega  the last (24th) letter of the Greek alphabet

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