[v. ik-strakt or especially for 5, ek-strakt; n. ek-strakt]
verb (used with object)
to get, pull, or draw out, usually with special effort, skill, or force: to extract a tooth.
to deduce (a doctrine, principle, interpretation, etc.): He extracted a completely personal meaning from what was said.
to derive or obtain (pleasure, comfort, etc.) from a particular source: He extracted satisfaction from the success of his sons.
to take or copy out (matter), as from a book.
to make excerpts from (a book, pamphlet, etc.).
to extort (information, money, etc.): to extract a secret from someone.
to separate or obtain (a juice, ingredient, etc.) from a mixture by pressure, distillation, treatment with solvents, or the like.
to determine (the root of a quantity that has a single root).
to determine (a root of a quantity that has multiple roots).
something extracted.
a passage taken from a book, article, etc.; excerpt; quotation.
a solution or preparation containing the active principles of a drug, plant juice, or the like; concentrated solution: vanilla extract.
a solid, viscid, or liquid substance extracted from a plant, drug, or the like, containing its essence in concentrated form: beef extract.

1375–1425; late Middle English < Latin extractus (past participle of extrahere). See ex-1, tract1

extractable, extractible, adjective
extractability, extractibility, noun
nonextractable, adjective
nonextracted, adjective
nonextractible, adjective
overextract, verb (used with object)
preextract, verb (used with object)
unextractable, adjective
unextracted, adjective

1. pry out. 6. evoke, educe, draw out, elicit. Extract, exact, extort, wrest imply using force to remove something. To extract is to draw forth something as by pulling, importuning, or the like: to extract a confession by torture. To exact is to impose a penalty, or to obtain by force or authority, something to which one lays claim: to exact payment. To extort is to wring something by intimidation or threats from an unwilling person: to extort money by threats of blackmail. To wrest is to take by force or violence in spite of active resistance: The courageous minority wrested power from their oppressors. 7. withdraw, distill. 10. citation, selection. 11. decoction, distillation.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
1.  to withdraw, pull out, or uproot by force
2.  to remove or separate
3.  to derive (pleasure, information, etc) from some source or situation
4.  to deduce or develop (a doctrine, policy, etc)
5.  informal to extort (money, etc)
6.  to obtain (a substance) from a mixture or material by a chemical or physical process, such as digestion, distillation, the action of a solvent, or mechanical separation
7.  to cut out or copy out (an article, passage, quotation, etc) from a publication
8.  to determine the value of (the root of a number)
9.  something extracted, such as a part or passage from a book, speech, etc
10.  a preparation containing the active principle or concentrated essence of a material: beef extract; yeast extract
11.  pharmacol a solution of plant or animal tissue containing the active principle
[C15: from Latin extractus drawn forth, from extrahere, from trahere to drag]
usage  Extract is sometimes wrongly used where extricate would be better: he will find it difficult extricating (not extracting) himself from this situation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

late 15c., from L. extractus, pp. of extrahere "draw out," from ex- "out" + trahere "to draw" (see tract (1)). Related: Extracted; extracting. The noun is first recorded 1540s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

extract ex·tract (ĭk-strākt')
v. ex·tract·ed, ex·tract·ing, ex·tracts

  1. To draw or pull out, using force or effort.

  2. To obtain from a substance by chemical or mechanical action, as by pressure, distillation, or evaporation.

  3. To remove for separate consideration or publication; excerpt.

  4. To determine or calculate the root of a number.

n. (ěk'strākt')
Abbr. ext.
  1. A concentrated preparation of a drug obtained by removing the active constituents of the drug with suitable solvents, evaporating all or nearly all of the solvent, and adjusting the residual mass or powder to the prescribed standard.

  2. A preparation of the essential constituents of a food or a flavoring; a concentrate.

ex·tract'a·ble or ex·tract'i·ble adj.
ex·trac'tor n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Cut marks suggest that stone tools were used to remove the flesh from the bones and to extract marrow.
He read right over bad sentences to extract ideas, information, and arguments.
The fuel cell uses microbes to extract electricity directly from food.
Using a pressurized brewing method, they extract more flavor from beans.
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