Pro*por"tion*al (?), a. [L. proportionalis: cf. F. proportionnel.]

1.

Having a due proportion, or comparative relation; being in suitable proportion or degree; as, the parts of an edifice are proportional.

Milton.

2.

Relating to, or securing, proportion.

Hutton.

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.

 

© Webster 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.]

© Webster 1913.

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