Fractional :: Fractional (a.) Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers..
Fractional :: Fractional (a.) Relatively small; inconsiderable; insignificant; as, a fractional part of the population..
Fractionally :: Fractionally (adv.) By fractions or separate portions; as, to distill a liquid fractionally, that is, so as to separate different portions..