noun (n)

• one of four equal parts(noun.quantity)

  Synonym:
  fourth, fourth part, one-fourth, one-quarter, quarter, twenty-five percent
  

  source: wordnet30
• A quarter. Specifically: (a) The fourth part of a pint; a gill. (b) The fourth part of a peck, or of a stone (14 ibs.).(noun)

  source: webster1913