adjective (a)

• relating to or expressed by a writing system that uses an alphabet(adj.pert)

  Example:
  Alphabetical writing system.
  

  Synonym:
  alphabetic
  

  source: wordnet30
• arranged in order according to the alphabet(adj.all)

  Example:
  Dictionaries list words in alphabetical order.
  

  Antonym:
  analphabetic
  

  source: wordnet30