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[frak-shuh-nl] /ˈfræk ʃə nl/

pertaining to ; comprising a part or the parts of a unit; constituting a :
fractional numbers.
comparatively small; inconsiderable or insignificant:
The profit on the deal was fractional.
Chemistry. 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.
relating to, containing, or constituting one or more fractions
of or denoting a process in which components of a mixture are separated by exploiting differences in their physical properties, such as boiling points, solubility, etc: fractional distillation, fractional crystallization
very small or insignificant
broken up; fragmented

1670s, from fraction + -al (1).


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  • Fractionate

    [frak-shuh-neyt] /ˈfræk ʃəˌneɪt/ verb (used with object), fractionated, fractionating. 1. to separate or divide into component parts, fragments, divisions, etc. 2. to separate (a mixture) into ingredients or into portions having different properties, as by distillation or crystallization; cause to undergo , crystallization, or the like. 3. to obtain by such a process. /ˈfrækʃəˌneɪt/ verb […]

  • Fractionating column

    noun 1. (chem) a long vertical cylinder used in fractional distillation, in which internal reflux enables separation of high and low boiling fractions to take place

  • Fractionation

    [frak-shuh-ney-shuh n] /ˌfræk ʃəˈneɪ ʃən/ noun 1. the act or process of . 2. the state of being . 3. Military. the division of a missile’s payload into several warheads. fractionation frac·tion·a·tion (frāk’shə-nā’shən) n. fractionation (frāk’shə-nā’shən) The separation of a chemical compound into components by fractional crystallization or fractional distillation.

  • Fractionator

    [frak-shuh-ney-ter] /ˈfræk ʃəˌneɪ tər/ noun 1. Chemistry. an apparatus for fractional distillation. Compare . 2. any apparatus capable of separating complex liquid substances, as blood, into their component parts.

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