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From: DICT.TW English-Chinese Dictionary 英漢字典

 pro·por·tion·al /prəˈporʃnə1, ˈpɔr, ʃənḷ/

From: Taiwan MOE computer dictionary


From: Network Terminology


From: Webster's Revised Unabridged Dictionary (1913)

 Pro·por·tion·al a.
 1. Having a due proportion, or comparative relation; being in suitable proportion or degree; as, the parts of an edifice are proportional.
 2. Relating to, or securing, proportion.
 3. Math. Constituting a proportion; having the same, or a constant, ratio; as, proportional quantities; momentum is proportional to quantity of matter.
 Proportional logarithms, logistic logarithms. See under Logistic.
 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.

From: Webster's Revised Unabridged Dictionary (1913)

 Pro·por·tion·al, n.
 1. Math. Any number or quantity in a proportion; as, a mean proportional.
 2. Chem. The combining weight or equivalent of an element. [Obs.]

From: WordNet (r) 2.0

      adj 1: properly related in size or degree or other measurable
             characteristics; usually followed by `to'; "punishment
             oughtt to be proportional to the crime"; "earnings
             relative to production" [syn: relative]
      2: increasing as the amount taxed increases [syn: graduated]
      n : one of the quantities in a mathematical proportion