• synonyms


[frak-shuh-ney-shuh n]
  1. the act or process of fractionating.
  2. the state of being fractionated.
  3. Military. the division of a missile's payload into several warheads.
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Origin of fractionation

First recorded in 1925–30; fractionate + -ion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fractionation

Historical Examples of fractionation

  • The acids obtained from the third fractionation had a melting point of 53°-54° C.

    Scientific American Supplement, No. 497, July 11, 1885


  • Another method of preparing argon is by fractionation of liquid air.

  • This doubling or fractionation of the consciousness and personality have often been described in the case of hysterical subjects.

  • An improved form of apparatus for the fractionation is represented in fig. 9.

  • Various methods of fractionation are similarly available, chiefly the precipitation of the intermediate 'dextrins' by alcohol.

fractionation in Medicine


  1. The process of dividing or separating into parts; breaking up.
  2. The division of a total therapeutic dose of radiation into small doses to be administered over a period of days or weeks.
  3. The separation of a chemical compound into components, as by distillation.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

fractionation in Science


  1. The separation of a chemical compound into components by fractional crystallization or fractional distillation.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.