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fraction

 - 5 dictionary results

frac⋅tion

[frak-shuhn]
–noun
1. Mathematics.
a. a number usually expressed in the form a/b.
b. a ratio of algebraic quantities similarly expressed.
2. Chemistry. (in a volatile mixture) a component whose range of boiling point temperatures allows it to be separated from other components by fractionation.
3. a part as distinct from the whole of anything; portion or section: The meeting started with a fraction of us present.
4. a very small part or segment of anything; minute portion: Only a fraction of the work was completed on time.
5. a very small amount; a little bit: It was only a fraction away from completion.
6. a piece broken off; fragment or bit.
7. the act of breaking.
8. Ecclesiastical. (in a Eucharistic service) the breaking of the Host.
–verb (used with object), verb (used without object)
9. to divide or break into fractions, sections, factions, etc.: Dissension threatens to fraction the powerful union.

Origin:
1350–1400; ME fraccioun < LL frāctiōn- (s. of frāctiō) a breaking (in pieces), equiv. to L frāct(us) (ptp. of frangere to break ) + -iōn- -ion


3, 6. See part.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To fraction
frac·tion   (frāk'shən)   
n.  
  1. Mathematics An expression that indicates the quotient of two quantities, such as 1/3 .

  2. A disconnected piece; a fragment.

  3. A small part; a bit: moved a fraction of a step.

  4. A chemical component separated by fractionation.


[Middle English fraccioun, a breaking, from Anglo-Norman, from Late Latin frāctiō, frāctiōn-, from Latin frāctus, past participle of frangere, to break; see bhreg- in Indo-European roots.]
Word History: Our word fraction did not originally have a mathematical sense. It goes back ultimately to the Latin verb frangere, "to break." From the stem of the past participle frāctus is derived Late Latin frāctiō (stem frāctiōn-), "a breaking" or "a breaking in pieces," as in the breaking of the Eucharistic Host. In Medieval Latin the word frāctiō developed its mathematical sense, which was taken into Middle English along with the word. The earliest recorded sense of our word is "an aliquot part of a unit, a fraction or subdivision," found in a work by Chaucer written about 1400. One of the next recorded instances of the word recalls its origins, referring to the "brekying or fraccioun" of a bone.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: frac·tion
Pronunciation: 'frak-sh&n
Function: noun
: one of several portions (as of a distillate) separable by fractionation fraction of blood plasma>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

fraction frac·tion (frāk'shən)
n.

  1. An expression that indicates the quotient of two quantities.

  2. A chemical component separated by fractionation.

  3. A disconnected piece; a fragment.

  4. An aliquot portion or any portion.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
fraction   (frāk'shən)  Pronunciation Key 
  1. A number that compares part of an object or a set with the whole, especially the quotient of two whole numbers written in the form a/b . The fraction 1/2 , which means 1 divided by 2, can represent such things as 10 pencils out of a box of 20, or 50 cents out of a dollar. See also decimal fraction, improper fraction, proper fraction.

  2. A chemical component separated by fractionation.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
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