Frac·tion·al a.
 1. Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers.
 2. Relatively small; inconsiderable; insignificant; as, a fractional part of the population.
 Fractional crystallization Chem., a process of gradual and approximate purification and separation, by means of repeated solution and crystallization therefrom.
 Fractional currency, small coin, or paper notes, in circulation, of less value than the monetary unit.
 Fractional distillation Chem., a process of distillation so conducted that a mixture of liquids, differing considerably from each other in their boiling points, can be separated into its constituents.

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 fractional currency
      n : paper currency in denominations less than the basic monetary
          unit