Pronunciation: (frak'shu-nl), [key]
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,frac•tion•ar•yPronunciation: (frak'shu-ner"ē). [key]
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.