proportional

proportional (comparative more proportional, superlative most proportional)

1. (mathematics) At a constant ratio (to). Two magnitudes (numbers) are said to be proportional if the second varies in a direct relation arithmetically to the first. Symbol: ∝.
   • 2012, David Ben-Chaim, Ratio and Proportion, page 34:

     For example, according to the gas laws, pressure is directly proportional to temperature: the quotient derived from pressure (numerator) and temperature (denominator) will be constant; however, pressure is inversely proportional to volume, meaning that the product between volume and pressure will be constant.

2. In proportion (to), proportionate. More common in US than UK.
   • 2014, Aravind Shenoy, Learning Bootstrap:

     This ensures consistency across your website design so that you don't end up with elements that are not adequately proportional with each other.

3. Of a typeface, having characters with natural (non-uniform) width (in contrast to monospace typefaces).
   • 2013, Eric A. Meyer, CSS Fonts: Web Typography Possibilities, page 2:

     A font is proportional if all characters in the font have different widths due to their various sizes.

proportional (plural proportionals)

1. (mathematics, geometry, archaic) A proportion.
   • 1828, William Thomas Brande, Tables in Illustration of the Theory of Definite Proportionals (page xiii)

     It is almost superfluous to remark that the numbers attached to the elements of compounds are those of the proportionals in which they combine […]

Proportion +‎ -al

• IPA^(key): /ˌpʀopɔʁt͡si̯oˈnaːl/

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proportional (comparative proportionaler, superlative am proportionalsten)

1. proportional