9 Grammatical Pitfalls


[ik-strap-uh-leyt] /ɪkˈstræp əˌleɪt/
verb (used with object), extrapolated, extrapolating.
to infer (an unknown) from something that is known; conjecture.
Statistics. to estimate (the value of a variable) outside the tabulated or observed range.
Mathematics. to estimate (a function that is known over a range of values of its independent variable) to values outside the known range.
verb (used without object), extrapolated, extrapolating.
to perform extrapolation.
Origin of extrapolate
1825-35; extra- + (inter)polate
Related forms
extrapolation, noun
extrapolative, extrapolatory
[ik-strap-uh-luh-tawr-ee, -tohr-ee] /ɪkˈstræp ə ləˌtɔr i, -ˌtoʊr i/ (Show IPA),
extrapolator, noun
overextrapolation, noun
Can be confused Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for extrapolated
  • In evolutionary theory, emergent evolution is the rise of a system that cannot be extrapolated from antecedent conditions.
  • extrapolated- compensate for your weaknesses and take measures to overcome them.
  • Such studies can be extrapolated to determine when the earliest modern humans lived.
  • extrapolated to a global scale this means that there must easily be over a million unfilled pits on the globe.
  • He plotted brain size against number of contacts and extrapolated to see how many friends a human ought to be able to handle.
  • But scientists still vigorously debate whether that risk can be extrapolated down to even lower exposures.
  • From a fleeting experience of life at the closest it would ever get to perfect, he extrapolated an entire world.
  • Firefly was excellent because it extrapolated a reasonable future.
  • The rest can then be extrapolated from the recorded data.
  • Maths here seems incorrectly extrapolated from out of date data.
British Dictionary definitions for extrapolated


(maths) to estimate (a value of a function or measurement) beyond the values already known, by the extension of a curve Compare interpolate (sense 4)
to infer (something not known) by using but not strictly deducing from the known facts
Derived Forms
extrapolation, noun
extrapolative, extrapolatory, adjective
extrapolator, noun
Word Origin
C19: extra- + -polate, as in interpolate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for extrapolated



1874, a back-formation from extrapolation by analogy of interpolate. Said in early references to be an expression of Sir George Airy (1801-1892), English mathematician and astronomer. Related: Extrapolated; extrapolating.

Online Etymology Dictionary, © 2010 Douglas Harper
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extrapolated in Science
To estimate the value of a quantity that falls outside the range in which its values are known.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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