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quadratic

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quad⋅rat⋅ic

  [kwo-drat-ik]
Use quadratic in a Sentence
–adjective
1. square.
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:
1650–60; quadrate + -ic

Related forms:
quad⋅rat⋅i⋅cal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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quad·rat·ic   (kwŏ-drāt'ĭk)   
adj.   Mathematics
Of, relating to, or containing quantities of the second degree.

[From quadrate.]
quad·rat'ic n., quad·rat'i·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

quadratic 
1656, "square," from quadrate (1398), from L. quadratus "square," pp. of quadrare "to square," related to quattuor "four." Quadratic equations (1668) so called because they involve the square of x.
Online Etymology Dictionary, © 2001 Douglas Harper
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Science Dictionary
quadratic   (kwŏ-drāt'ĭk)  Pronunciation Key 
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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