— fractionally , adv.
/frak"sheuh nl/ , adj.
1. pertaining to fractions; comprising a part or the parts of a unit; constituting a fraction: fractional numbers.
2. comparatively small; inconsiderable or insignificant: The profit on the deal was fractional.
3. Chem. of or noting a process, as distillation, crystallization, or oxidation, by which the component substances of a mixture are separated according to differences in certain of their properties, as boiling point, critical temperature, or solubility.
Also, fractionary /frak"sheuh ner'ee/ .
[ 1665-75; FRACTION + -AL 1 ]