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quadratic

[kwo-drat-ik] /kwɒˈdræt ɪk/
adjective
1.
2.
Algebra. involving the square and no higher power of the unknown quantity; of the second degree.
noun
3.
a quadratic polynomial or equation.
Origin
1650-1660
1650-60; quadrate + -ic
Related forms
quadratically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for quadratically

quadratic

/kwɒˈdrætɪk/
noun
1.
Also called quadratic equation. an equation containing one or more terms in which the variable is raised to the power of two, but no terms in which it is raised to a higher power
adjective
2.
of or relating to the second power
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 quadratically

quadratic

adj.

1650s, "square," with -ic + obsolete quadrate "a square; a group of four things" (late 14c.), from Latin quadratum, noun use of neuter adjective quadratus "square, squared," past participle of quadrare "to square, set in order, complete" (see quadrant). Quadratic equations (1660s) so called because they involve the square of x.

Online Etymology Dictionary, © 2010 Douglas Harper
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quadratically in Science
quadratic
  (kwŏ-drāt'ĭk)   
Relating to a mathematical expression containing a term of the second degree, such as x2 + 2. ◇ A quadratic equation is an equation having the general form ax2 + bx + c = 0, where a, b, and c are constants. ◇ The quadratic formula is x = -b ± √(b2 - 4ac)/2a. It is used in algebra to calculate the roots of quadratic equations.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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