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2 definitions found
 for fractional
From The Collaborative International Dictionary of English v.0.48 :

  Fractional \Frac"tion*al\, a.
     1. Of or pertaining to fractions or a fraction; constituting
        a fraction; as, fractional numbers.
        [1913 Webster]
     2. Relatively small; inconsiderable; insignificant; as, a
        fractional part of the population.
        [1913 Webster]
     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.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

      adj 1: constituting or comprising a part or fraction of a
             possible whole or entirety; "a fractional share of the
             vote"; "a partial dose" [ant: whole]

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