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Related to power series: Taylor series
A sum of successively higher integral powers of a variable or combination of variables, each multiplied by a constant coefficient.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Mathematics) a mathematical series whose terms contain ascending positive integral powers of a variable, such as a0 + a1x + a2x2 +…
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Math. an infinite series in which the terms are coefficients times successive powers of a given variable, or times products of powers of two or more variables.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.