a. - Having a due proportion, or comparative relation; being in suitable proportion or degree; as, the parts of an edifice are proportional.
a. - Relating to, or securing, proportion.
a. - Constituting a proportion; having the same, or a constant, ratio; as, proportional quantities; momentum is proportional to quantity of matter.
n. - Any number or quantity in a proportion; as, a mean proportional.
n. - The combining weight or equivalent of an element.