[pro.por.tion.al] n (14c): a number or quantity in a proportion
[2]proportional adj (15c) 1 a: corresponding in size, degree, or intensity b: having the same or a constant ratio "corresponding sides of similar triangles are ~"
2: regulated or determined in size or degree with reference to proportions "a ~ system of immigration quotas" -- pro.por.tion.al.i.ty n -- pro.por.tion.al.ly adv