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[ik-strap-uh-ley-shuh n] /ɪkˌstræp əˈleɪ ʃən/
an act or instance of inferring an unknown from something that is known.
Statistics, Mathematics. the act or process of estimating the value of a variable or function outside the tabulated or observed range.
Origin of extrapolation
First recorded in 1870-75; extrapolat(e) + -(t)ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Word Origin and History for extrapolation

by 1867, from extra- + back half of interpolation; original sense was "insert intermediate terms in a mathematical series." Transferred sense of "drawing a conclusion about the future based on present tendencies" is from 1889. Cf. extrapolate.

Online Etymology Dictionary, © 2010 Douglas Harper
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extrapolation in Culture
extrapolation [(ik-strap-uh-lay-shuhn)]

A mathematical procedure designed to enable one to estimate unknown values of a parameter from known values. A common method of extrapolation is to look at data on a curve, then extend the curve into regions for which there is no data. Extrapolation is often used to predict the future.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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