" proportional "

[Noun]  | "pro*por*tion*al" | \ prə-ˈpȯr-shnəl \

1: a number or quantity in a proportion

Origin: 1570 ;

 Borrowed from Late Latin prōportiōnāle, noun derivative from neuter of prōportiōnālis {see: |proportional:2|proportional:2};

[Noun]  | "proportional representation" 

1: an electoral system in which the number of seats held by a political group or party in a legislative body is determined by the number of popular votes received

Origin: 1870 ;

[Noun]  | "proportional tax" 

1: a tax in which the tax rate remains constant regardless of the amount of the tax base

Origin: circa 1943 ;

[Noun]  | "mean proportional" 

1: geometric mean; especially : the square root (such as x) of the product of two numbers (such as a and b) when expressed as the means of a proportion (such as a/x = x/b)

Origin: 1571 ;

[Adjective]  | "proportional" 

1: corresponding in size, degree, or intensity

2: having the same or a constant ratio

3: regulated or determined in size or degree with reference to proportions

Origin: 14th century ;

 Middle English proporcional, proporcionel, borrowed from Middle French & Late Latin; Middle French proporcionel, borrowed from Late Latin prōportiōnālis, from Latin prōportiōn-, prōportiō "analogy, proper spatial relation between parts" + -ālis {see: |-al:1|-al:1} {mat|proportion:1|};

[Adjective]  | "directly proportional" 

1: related by direct variation

Origin: 1796 ;

[Adjective]  | "inversely proportional" 

1: related by inverse variation

Origin: 1723 ;

[Plural noun]  | "proportional parts" 

1: fractional parts of the difference between successive entries in a table for use in linear interpolation

Origin: 1728 ;

[Adjective]  | "proportional" 

[Noun]  | "proportional taxes" 

[Noun]  | "proportional tax"