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1 definition found
 for Proportional scale
From The Collaborative International Dictionary of English v.0.48 :

  Proportional \Pro*por"tion*al\, a. [L. proportionalis: cf. F.
     1. Having a due proportion, or comparative relation; being in
        suitable proportion or degree; as, the parts of an edifice
        are proportional. --Milton.
        [1913 Webster]
     2. Relating to, or securing, proportion. --Hutton.
        [1913 Webster]
     3. (Math.) Constituting a proportion; having the same, or a
        constant, ratio; as, proportional quantities; momentum is
        proportional to quantity of matter.
        [1913 Webster]
     Proportional logarithms, logistic logarithms. See under
     Proportional scale, a scale on which are marked parts
        proportional to the logarithms of the natural numbers; a
        logarithmic scale.
     Proportional scales, compasses, dividers, etc.
        (Draughting), instruments used in making copies of
        drawings, or drawings of objects, on an enlarged or
        reduced scale.
        [1913 Webster]

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