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1 involving the second and no higher power of an unknown quantity or variable (quadratic equation).
2 square.
—n.
2 (in pl.) the branch of algebra dealing with these.

Useful english dictionary. 2012.

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• Quadratic — Quad*rat ic, a. [Cf. F. quadratique.] [1913 Webster] 1. Of or pertaining to a square, or to squares; resembling a quadrate, or square; square. [1913 Webster] 2. (Crystallog.) Tetragonal. [1913 Webster] 3. (Alg.) Pertaining to terms of the second… …   The Collaborative International Dictionary of English

• quadratic — (adj.) 1650s, square, from quadrate (late 14c.), from L. quadratus square, pp. of quadrare to square, related to quattuor four (see FOUR (Cf. four)). Quadratic equations (1660s) so called because they involve the square of x …   Etymology dictionary

• quadratic — [kwä drat′ik] adj. [ QUADRATE + IC] 1. Rare square 2. Algebra involving a quantity or quantities that are squared but none that are raised to a higher power n. Algebra a quadratic term, expression, or equation quadratically adv …   English World dictionary

• quadratic — ► ADJECTIVE Mathematics ▪ involving the second and no higher power of an unknown quantity or variable …   English terms dictionary

• Quadratic — In mathematics, the term quadratic describes something that pertains to squares, to the operation of squaring, to terms of the second degree, or equations or formulas that involve such terms. Quadratus is Latin for square . Mathematics Algebra… …   Wikipedia

• quadratic — /kwɒdˈrætɪk / (say kwod ratik) adjective 1. square. 2. Algebra involving the square and no higher power of the unknown quantity; the second degree: a quadratic equation. –noun 3. Algebra a quadratic polynomial or equation. {from quadrate + ic} …   Australian English dictionary

• quadratic — quadratically, adv. /kwo drat ik/, adj. 1. square. 2. Algebra. involving the square and no higher power of the unknown quantity; of the second degree. n. 3. a quadratic polynomial or equation. [1650 60; QUADRATE + IC] * * * …   Universalium